Side by side

Formex Essence ThirtyNinevsTissot PRX UFO Robot Grendizer 50th Anniversary

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

Essence ThirtyNine
FormexEssence ThirtyNine
MSRP $2,390
PRX UFO Robot Grendizer 50th Anniversary
TissotPRX UFO Robot Grendizer 50th Anniversary
MSRP $1,100

At a glance

11 of 29 specs differ
Diameter
Essence ThirtyNine39mm
PRX UFO Robot Grendizer 50th Anniversary40mm
Power Reserve
Essence ThirtyNine41h
PRX UFO Robot Grendizer 50th Anniversary80h
Water Resistance
Essence ThirtyNine100m
PRX UFO Robot Grendizer 50th Anniversary100m
MSRP
Essence ThirtyNine$2,390
PRX UFO Robot Grendizer 50th Anniversary$1,100

Full specifications

Case

4 specs
Diameter
39mm
40mm
Thickness
10mm
10.93mm
Lug-to-Lug
45mm
39.5mm
Lug Width
20mm
12mm

Crystal & Dial

4 specs
AR Coating
Inner
Yes
Dial Color
Space Ghost
Black
Indices
Applied
Indexes
Lume
Super-LumiNova
Super-LumiNova ®

Movement

2 specs
Caliber
Sellita SW200-1
Powermatic 80
Power Reserve
41h
80h

Pricing

1 specs
MSRP
$2,390
$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.

Formex Essence ThirtyNine

The Formex Essence ThirtyNine is praised for its impressive build quality and value, featuring a patented case suspension system for comfort and protection. It houses a COSC-certified Sellita SW200-1 movement with a 38-hour power reserve and a tool-free strap quick-release system. A minor inconvenience noted is the specific closing order of the clasp. On balance, reviewers rate the Formex Essence ThirtyNine highly for its comfortable wearability and excellent value at its price point.

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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