Side by side

Tissot PRX UFO Robot Grendizer 50th AnniversaryvsWilliam Wood Fire Watch

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

PRX UFO Robot Grendizer 50th Anniversary
TissotPRX UFO Robot Grendizer 50th Anniversary
MSRP $1,100
Fire Watch
William WoodFire Watch
MSRP $995

At a glance

14 of 29 specs differ
Diameter
PRX UFO Robot Grendizer 50th Anniversary40mm
Fire Watch41mm
Power Reserve
PRX UFO Robot Grendizer 50th Anniversary80h
Fire Watch40h
Water Resistance
PRX UFO Robot Grendizer 50th Anniversary100m
Fire Watch100m
MSRP
PRX UFO Robot Grendizer 50th Anniversary$1,100
Fire Watch$995

Full specifications

Case

6 specs
Category
Dress
Diver
Diameter
40mm
41mm
Thickness
10.93mm
15mm
Lug-to-Lug
39.5mm
49mm
Lug Width
12mm
20mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

5 specs
Crystal
Sapphire
Domed Sapphire
AR Coating
Yes
Inner
Dial Color
Black
Steel
Indices
Indexes
Applied
Lume
Super-LumiNova ®
None

Movement

2 specs
Caliber
Powermatic 80
Seiko NH35
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$1,100
$995

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What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Tissot PRX UFO Robot Grendizer 50th Anniversary

The Tissot PRX UFO Robot Grendizer 50th Anniversary is praised for its tasteful integration of anime elements onto the PRX design, featuring an engraved Grendizer bust on a sunburst blue dial with Super-Luminova, and is the first 40mm PRX to omit the date. Owners widely report huge demand, with all 1975 units selling out quickly. The packaging and watch box are described as "dope" and "insane," with one commenter stating the packing alone is "worth the buy." The watch retains the familiar 40mm case, Powermatic 80 movement with 80-hour power reserve, and integrated bracelet. Some find the Grendizer dial less appealing than the standard waffle dial, with one owner calling it "childish," while another considers it "the best PRX." The Grendizer graphic is less prominent in person than in photos, and the watch has a ghost date position. The Tissot PRX UFO Robot Grendizer 50th Anniversary retails for US$825 / CHF 795.

William Wood Fire Watch

William Wood Fire Watch owners praise its conversational value and attractive design, noting its fun graphics and comfortable straps. Reviewers highlight the unique British fire exit sign inspiration and playful details. However, the small day and date indicators are difficult to read, and one owner points out that the day wheel windows do not align to show seven days. The William Wood Fire Watch is priced at $1,903 USD and uses a Sellita SW220 automatic movement with a 41-hour power reserve. On balance, owners and reviewers rate the William Wood Fire Watch highly for its unique design and conversational appeal at its price point.

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