Side by side

Citizen Series 8 831vsTissot PRX UFO Robot Grendizer

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

Series 8 831
CitizenSeries 8 831
MSRP $1,095
PRX UFO Robot Grendizer
TissotPRX UFO Robot Grendizer
MSRP $950

At a glance

11 of 29 specs differ
Diameter
Series 8 83140mm
PRX UFO Robot Grendizer40mm
Power Reserve
Series 8 83142h
PRX UFO Robot Grendizer80h
Water Resistance
Series 8 831100m
PRX UFO Robot Grendizer100m
MSRP
Series 8 831$1,095
PRX UFO Robot Grendizer$950

Full specifications

Case

4 specs
Category
Sport
Dress
Thickness
12mm
10.93mm
Lug-to-Lug
46mm
39.5mm
Lug Width
20mm
12mm

Crystal & Dial

4 specs
AR Coating
Underside
Yes
Dial Color
Green
Blue
Indices
Applied
Indexes
Lume
None
Super-LumiNova ®

Movement

2 specs
Caliber
9051
Powermatic 80
Power Reserve
42h
80h

Pricing

1 specs
MSRP
$1,095
$950

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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.

Citizen Series 8 831

Owners widely praise the Citizen Series 8 831 for its finishing, with one owner noting it exceeded expectations. Reviewers highlight the textured Ice Blue dial and the bracelet's play of light, contributing to a comfortable and luxurious feel on the wrist. The watch features a 40mm ion-plated stainless steel case, a sapphire crystal, and 100 meters of water resistance. It is powered by the in-house Miyota Caliber 9051 automatic movement, which has a 42-hour power reserve and an accuracy range of -10 to +20 seconds per day. On balance, owners and reviewers rate the Citizen Series 8 831 highly for its impressive finishing and dial design at its price point.

From video reviewers

The case finishing, with its contrasting brushed and polished surfaces, is a notable strength. The 40mm case size and comfortable fit are also consistently mentioned. Reviewers did not reach a consensus on any weaknesses.

Tissot PRX UFO Robot Grendizer

The Tissot PRX UFO Robot Grendizer is noted for its unique sunburst blue dial featuring an embossed Grendizer bust, which, along with the hands and indices, offers yellow-green and blue-green luminescence respectively, while the seconds hand is shaped like Grendizer's weapon. This special edition utilizes the Powermatic 80 movement, providing an 80-hour power reserve, and comes in distinctive Spazer spaceship packaging. Reviewers suggest the €120 price premium for these thematic elements and packaging may only appeal to fans of the manga. Overall, reviewers consider the Tissot PRX UFO Robot Grendizer a clever, niche special edition that avoids excessive gimmickry, particularly appealing to manga enthusiasts.

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