Side by side

Hamilton Jazzmaster Auto ChronovsSeiko Prospex SPEEDTIMER

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

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Hamilton Jazzmaster Auto Chrono

Owners widely praise the Hamilton Jazzmaster Auto Chrono for its value and dressy yet substantial look. The H-31 or adapted 7753 movement is noted, alongside a 60-hour power reserve. Some owners prefer a 3-6-9 subdial layout or a smaller case size, and the movement's thickness makes it unsuitable for those seeking a slim watch. On balance, owners rate the Hamilton Jazzmaster Auto Chrono highly for its value and refined aesthetic.

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.

At a glance

12 of 29 specs differ
Diameter
Jazzmaster Auto Chrono42mm
Prospex SPEEDTIMER41.4mm
Power Reserve
Jazzmaster Auto Chrono60h
Prospex SPEEDTIMER
Water Resistance
Jazzmaster Auto Chrono100m
Prospex SPEEDTIMER100m
MSRP
Jazzmaster Auto Chrono$2,095
Prospex SPEEDTIMER$750

Full specifications

Case

4 specs
Diameter
42mm
41.4mm
Thickness
15.23mm
13mm
Lug-to-Lug
0mm
45.9mm
Lug Width
22mm
21mm

Crystal & Dial

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

Movement

3 specs
Caliber
H-21
V192
Type
Automatic
Quartz
Power Reserve
60h
0h

Pricing

1 specs
MSRP
$2,095
$750
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