Side by side

Horage Autark K2 Small SecondsvsTissot PRX UFO Robot Grendizer 50th Anniversary

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

Autark K2 Small Seconds
HorageAutark K2 Small Seconds
MSRP $5,590
PRX UFO Robot Grendizer 50th Anniversary
TissotPRX UFO Robot Grendizer 50th Anniversary
MSRP $1,100

At a glance

11 of 29 specs differ
Diameter
Autark K2 Small Seconds39.5mm
PRX UFO Robot Grendizer 50th Anniversary40mm
Power Reserve
Autark K2 Small Seconds72h
PRX UFO Robot Grendizer 50th Anniversary80h
Water Resistance
Autark K2 Small Seconds100m
PRX UFO Robot Grendizer 50th Anniversary100m
MSRP
Autark K2 Small Seconds$5,590
PRX UFO Robot Grendizer 50th Anniversary$1,100

Full specifications

Case

5 specs
Diameter
39.5mm
40mm
Thickness
8.8mm
10.93mm
Lug-to-Lug
48.3mm
39.5mm
Lug Width
22mm
12mm
Material
Titanium
Stainless Steel

Crystal & Dial

3 specs
AR Coating
No
Yes
Indices
Applied
Indexes
Lume
Super-LumiNova
Super-LumiNova ®

Movement

2 specs
Caliber
Horage K2
Powermatic 80
Power Reserve
72h
80h

Pricing

1 specs
MSRP
$5,590
$1,100

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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.

Horage Autark K2 Small Seconds

Owners and reviewers widely praise Horage's technical capabilities and enthusiast-driven approach, with one owner highlighting the brand's craftsmanship, reliability, and value. The Horage Autark K2 Small Seconds features a Grade 5 titanium case and bracelet praised for being lightweight and comfortable for daily wear, offering 100 meters of water resistance and a 72-hour power reserve. Accuracy is rated within -4/+6 seconds per day. On balance, owners and reviewers rate the Horage Autark K2 Small Seconds highly for its technical innovation and value proposition.

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.

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