Side by side

Tissot PRX UFO Robot Grendizer 50th AnniversaryvsZelos Spearfish 3

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
Spearfish 3
ZelosSpearfish 3
MSRP $749

At a glance

13 of 29 specs differ
Diameter
PRX UFO Robot Grendizer 50th Anniversary40mm
Spearfish 340mm
Power Reserve
PRX UFO Robot Grendizer 50th Anniversary80h
Spearfish 340h
Water Resistance
PRX UFO Robot Grendizer 50th Anniversary100m
Spearfish 3200m
MSRP
PRX UFO Robot Grendizer 50th Anniversary$1,100
Spearfish 3$749

Full specifications

Case

6 specs
Category
Dress
Diver
Thickness
10.93mm
11.5mm
Lug-to-Lug
39.5mm
40mm
Lug Width
12mm
20mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

4 specs
AR Coating
Yes
Inner
Dial Color
Black
Diver - Forged Carbon
Indices
Indexes
Applied
Lume
Super-LumiNova ®
None

Movement

2 specs
Caliber
Powermatic 80
La Joux-Perret G100
Power Reserve
80h
40h

Pricing

1 specs
MSRP
$1,100
$749

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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.

Zelos Spearfish 3

The Zelos Spearfish 3 is widely praised for its exceptional finishing, with razor-sharp polish and flawless brushed transitions that owners feel exceed its price point. The 40mm case is noted for its wearability, and the La Joux-Perret G100 movement offers a 68-hour power reserve, with reported accuracy averaging +2.6 seconds per day. Reviewers highlight the exceptionally smooth bi-directional bezel and a tool-less micro-adjustment clasp described as best-in-class among microbrands. The sapphire sandwich construction and lumed bezel are also cited as desirable features. Overall, owners and reviewers rate the Zelos Spearfish 3 highly for its outstanding finishing and value at its price point.

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