The Tissot PRX UFO Robot Grendizer 50th Anniversary Special Edition is a 1,975-piece Swiss automatic watch celebrating the 1975 debut of Go Nagai’s super robot. It uses a 40mm black-PVD PRX case, a sculpted luminous Grendizer dial, an 18K-gold Harken seconds hand, and a Spazer-inspired presentation capsule. Tissot’s U.S. page lists it at $1,100, but says it is sold out and will not be restocked.
The direct answer
The Tissot PRX UFO Robot Grendizer 50th Anniversary Special Edition is a Swiss-made, 40mm automatic watch created with Go Nagai to celebrate 50 years of UFO Robot Grendizer. Reference T137.407.33.051.01 is limited to 1,975 individually numbered pieces—the year Grendizer first appeared—and combines the PRX’s 1970s-inspired design with an all-black PVD case, character-themed lume, an 18K-gold Harken seconds hand, and a presentation package modeled on Grendizer’s Spazer.
It was listed at $1,100 in the United States, but Tissot’s U.S. product page says it is sold out and will not be restocked. The Canadian product page carries the same warning. That makes this a secondary-market collector’s item rather than a normally available new release in those markets. Availability and pricing differ by country; Tissot’s Ireland site, for example, lists the watch at €1,095.
Why this PRX is more than an anime-themed dial
The collaboration works because its three key stories overlap:
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- COSC Certified Chronometer
- Case Size: 39.00 mm, Band Width: 20 mm, Case Thickness: 10.98 mm
- Automatic movement, 316L solid stainless steel bracelet, Roman dial type, Date
- Water-resistant up to a pressure of 10 bar (100 m / 330 ft): suitable for short periods of recreational swimming and showering, but no diving or snorkeling.
- Grendizer’s 50th anniversary: Go Nagai’s super-robot character debuted in 1975, and the production run is limited to 1,975 watches.
- The PRX’s design language: The PRX is associated with the integrated-bracelet sports-watch style of the 1970s, the same decade that produced Grendizer.
- A genuine mechanical watch: Beneath the character design is Tissot’s Swiss automatic Powermatic 80 movement, with an 80-hour power reserve and a Nivachron balance spring.
That combination gives the edition a stronger rationale than simply printing a popular character on a conventional watch. The sculpted dial, numbered caseback, creator involvement, and unusual presentation box all contribute to the collectible concept.
Design and Grendizer details
The 40mm case and bracelet are made from 316L stainless steel and finished with black PVD coating. The monochrome treatment makes the watch more discreet than the earlier blue-dial Grendizer PRX, but it also gives the edition a more overtly commemorative and futuristic appearance.
Rather than using a flat character illustration alone, the dial incorporates a sculpted bust of Grendizer. Super-LumiNova reveals the character in low-light conditions. The seconds hand is shaped after Grendizer’s Harken weapon and is made from 18K gold, providing a small but significant contrast against the black design.
The watch has a scratch-resistant sapphire crystal with double-sided anti-reflective coating. Its transparent caseback displays the movement’s engraved rotor and carries the individual edition number, along with the inscription “Limited Edition 1 of 1975.” The wording refers to the edition size, not to a claim that every watch is the first piece.
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The Spazer-inspired presentation package
The packaging is central to the release, not a minor extra. Tissot presents the watch inside a Spazer-inspired UFO capsule, nested in a black-and-gold outer box. The package also includes drawings created specially for the edition and hand-signed by Go Nagai.
This matters when evaluating a pre-owned example. A watch offered without its original capsule, outer box, signed drawings, or matching documentation may still be genuine, but it is not a complete presentation of the collectible as originally sold. Buyers should ask for photographs of the exact numbered watch and all included materials rather than assuming that generic PRX packaging is equivalent.
Specifications
| Specification | Detail |
|---|---|
| Model | Tissot PRX UFO Robot Grendizer 50th Anniversary 40mm |
| Reference | T137.407.33.051.01 |
| Edition size | 1,975 individually numbered pieces |
| Case diameter | 40mm |
| Approximate dimensions | 39.50mm length × 40mm width × 10.93mm thickness |
| Case material | 316L stainless steel with black PVD coating |
| Crystal | Scratch-resistant sapphire with double-sided anti-reflective coating |
| Movement | Swiss automatic Powermatic 80 with patented Nivachron balance spring |
| Power reserve | Up to 80 hours |
| Water resistance | 10 bar, equivalent to 100 metres or 330 feet |
| Bracelet | Black-PVD stainless steel with quick-release/interchangeable functionality |
| Caseback | Engraved and see-through |
| Country of manufacture | Switzerland |
| U.S. warranty | Two years, according to Tissot’s U.S. product information |
How it compares with the 2024 Grendizer PRX
Tissot’s 50th Anniversary edition follows the first Grendizer PRX released in 2024. Both models use the Powermatic 80 movement and incorporate Grendizer references including character-themed lume, a Harken-style seconds hand, an engraved rotor, and Spazer-inspired packaging.
Rank #2
- Tissot Chemin Des Tourelles Automatic Silver Dial Men's Watch T139.807.11.031.00
The main visual change is the move from the earlier model’s blue dial and stainless-steel presentation to a full black PVD treatment. The anniversary watch also has the more explicit 1,975-piece commemorative production run. In other words, the 2024 model is the original PRX-Grendizer collaboration, while this version is the darker, more narrowly anniversary-focused edition.
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For U.S. buyers, Tissot lists the retail price at $1,100 and states that the watch is sold out and will not be restocked. Tissot’s Canadian page likewise marks it sold out and says it will not return to stock. That is different from saying that every example has been sold globally: official evidence confirms the limited quantity and the status in those markets, but it does not establish a universal worldwide sellout date.
If you are searching for the Tissot PRX Grendizer 50th Anniversary reference T137.407.33.051.01, treat any current listing as a secondary-market transaction unless it is demonstrably from an authorized retailer with legitimate remaining inventory. Before paying, verify:
- the exact reference on the watch and paperwork;
- the individual number and clear photographs of the caseback;
- the seller’s identity, location, return policy, and authentication process;
- whether the two-year warranty is valid, transferable, expired, or unavailable;
- the condition of the black PVD coating, bracelet, crystal, crown, and movement;
- the original Spazer-inspired capsule, black-and-gold box, signed Go Nagai drawings, and documentation;
- the total price, including taxes, shipping, import charges, and any marketplace fees.
Do not assume that a marketplace listing is an authorized Tissot sale, and do not treat a seller’s use of stock photography as proof that the pictured numbered watch is the one being offered. The official retail price is a useful historical reference, not a reliable ceiling for an unverified secondary-market listing. There is not enough evidence to claim a dependable resale premium or investment value.
Ownership and care considerations
The automatic movement offers a practical 80-hour power reserve, so the watch can be set aside over a weekend and still potentially be running when picked up again. The 100-metre water-resistance rating is useful for everyday wear, but it does not remove the need to ensure that the crown, seals, and case are properly maintained—particularly on an older or previously serviced example.
Black PVD is a coating over the steel, so deep impacts or abrasive contact can expose the underlying metal. A soft microfiber cloth is appropriate for light surface cleaning, while aggressive polishing can damage the finish and alter the appearance of the case. Bracelet sizing is better handled by a competent watchmaker or experienced jeweller than by an improvised tool on a scarce, coated limited edition. A protective watch pouch or travel case can help prevent scratches during transport, but neither is an official replacement for the distinctive Tissot presentation capsule.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Who should consider it?
This PRX makes the most sense for a collector who genuinely values at least two of its three identities: Grendizer memorabilia, PRX design, and mechanical watches. It has enough technical substance to be more than a novelty, but its strongest appeal remains emotional and collectible. The sculpted character, Harken hand, numbered production, signed artwork, and capsule packaging are precisely the details that a conventional PRX buyer may not need—and that a Grendizer fan may consider essential.
Rank #3
- Case Size: 40.00 mm, Band Width: 20 mm, Case Thickness: 10.23 mm
- Automatic movement, 316L solid stainless steel bracelet, Index dial type, Date
- Water-resistant up to a pressure of 5 bar (50 m / 165 ft): suitable for short periods of recreational swimming and showering, but no diving or snorkeling.
It is less compelling if you want the best-value everyday automatic watch, dislike integrated-bracelet designs, or would be uncomfortable wearing a PVD-coated watch that may show marks over time. Because the U.S. edition is no longer being restocked, buyers should also be willing to walk away from incomplete, poorly documented, or suspiciously priced examples.
Bottom line
The Tissot PRX UFO Robot Grendizer 50th Anniversary Special Edition is a thoughtfully constructed crossover: a 1970s-inspired Swiss sports watch celebrating a 1975 Japanese super robot. Its 1,975-piece limit, black PVD execution, 18K-gold Harken seconds hand, luminous sculpted Grendizer dial, and Spazer-inspired presentation make it substantially more interesting than a logo-only collaboration.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesAt the time of Tissot’s listed U.S. and Canadian status, the sensible buying approach is caution rather than urgency. The official U.S. price was $1,100, but the watch is sold out and will not be restocked there. Any replacement purchase should be judged on authenticity, condition, warranty, numbering, and completeness of the original presentation—not on unsupported assumptions about future investment returns.
Frequently Asked Questions
What is the Tissot PRX Grendizer 50th Anniversary watch?
The watch is a 40mm Swiss-made automatic PRX limited to 1,975 individually numbered pieces. It has a black-PVD stainless-steel case and bracelet, a Powermatic 80 movement, an 80-hour power reserve, sapphire crystal, 100-metre water resistance, and a Grendizer-themed dial and seconds hand.
How much did the Tissot Grendizer 50th Anniversary PRX cost?
Tissot’s U.S. product page lists the retail price at $1,100. Its U.S. page says the watch is sold out and will not be restocked. The Canadian page also marks it sold out. Prices and availability in other countries may differ.
How many Tissot PRX Grendizer anniversary watches were made?
The edition is limited to 1,975 watches, reflecting Grendizer’s 1975 debut. Each watch is individually numbered, and the see-through caseback includes the limited-edition inscription.
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What should I check before buying one on the secondary market?
Check the exact reference, caseback number, paperwork, seller reputation, warranty status, return policy, and condition. Also confirm whether the Spazer-inspired capsule, black-and-gold outer box, signed Go Nagai drawings, and other original documentation are included.
The Bottom Line
Bottom line: This is a legitimate Swiss automatic PRX with a well-developed Grendizer concept, limited to 1,975 numbered pieces. Its official U.S. supply is gone, so secondary-market buyers should verify the exact reference, seller, warranty, condition, and complete Spazer-inspired packaging before considering the asking price.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
