Side by side

Citizen Tsuki-yomi A-TvsSeiko Prospex SPEEDTIMER

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

Tsuki-yomi A-T
CitizenTsuki-yomi A-T
MSRP $656
Prospex SPEEDTIMER
SeikoProspex SPEEDTIMER
MSRP $750

At a glance

13 of 29 specs differ
Diameter
Tsuki-yomi A-T43mm
Prospex SPEEDTIMER41.4mm
Power Reserve
Tsuki-yomi A-T40h
Prospex SPEEDTIMER40h
Water Resistance
Tsuki-yomi A-T100m
Prospex SPEEDTIMER100m
MSRP
Tsuki-yomi A-T$656
Prospex SPEEDTIMER$750

Full specifications

Case

6 specs
Category
Dress
Chronograph
Diameter
43mm
41.4mm
Thickness
12mm
13mm
Lug-to-Lug
46mm
45.9mm
Lug Width
22mm
21mm
Material
Super Titanium
Stainless Steel

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Red
Black
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
H874
V192
Type
Solar
Quartz

Pricing

1 specs
MSRP
$656
$750

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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 Tsuki-yomi A-T

The Citizen Tsuki-yomi A-T is widely praised for its gorgeous, detailed moonphase complication, available in gray, blue, or red, and its visually light Super Titanium case. Reviewers and owners alike highlight the comfortable wearability offered by the 43mm case, which is 11mm thick with short lugs and features a mix of brushed and polished finishes. The radio-controlled atomic timekeeping and Eco-Drive movement are noted as key features, along with a world time zone guide on the case back. Some users find the pushers and crown for setting time zones and hemisphere settings, along with the chapter ring functions, to be unintuitive. On balance, owners and reviewers rate the Citizen Tsuki-yomi A-T highly for its striking moonphase display and comfortable, lightweight titanium construction at a great price.

Seiko Prospex SPEEDTIMER

Owners widely praise the Seiko Prospex SPEEDTIMER's design, with specific mentions of its beautiful ice blue sundial and compact 39mm case size, which some note wears smaller than its specifications due to a short lug-to-lug distance. Reviewers highlight its racing-inspired aesthetic and versatility, with one owner finding the 39mm solar model a sturdy and reliable everyday watch with 100m water resistance. However, some owners question the value proposition, citing the $700 price for a solar quartz model and a thickness of 13mm, while others expressed a preference for automatic movements. On balance, owners and reviewers appreciate the Seiko Prospex SPEEDTIMER's attractive vintage-inspired design and compact wearability, though some debate its value and thickness for a solar quartz chronograph.

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