Seaholm Flats ChronographvsSeiko Prospex SPEEDTIMER Mechanical
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.
Flats Chronograph
Prospex SPEEDTIMER Mechanical
Diameter
41mm
39.5mm
Lug-to-Lug
n/a
44.5mm
Thickness
n/a
12mm
Water Resistance
200m
200m
Power Reserve
42h
72h
highest
MSRP
$3,495
$995
lowest
Movement
ETA 2894-2
Seiko 6R55
Case
4 specsCrystal & Dial
4 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Seaholm Flats Chronograph owners report robust build quality with features designed for shock and magnetism resistance. One owner found the watch bulky and sold it at half its retail price after acquiring it on the grey market. Overall, owners rate the Seaholm Flats Chronograph based on its build quality and value, though some find its dimensions challenging.
The Seiko Prospex SPEEDTIMER Mechanical is widely praised for its comfortable 39.5mm case size and appealing matte silver-white dial with LumiBrite indices. Owners find the watch visually attractive and comfortable for daily wear, with the 72-hour power reserve of the 6R55 automatic movement noted as a strength. Some users appreciate the chronograph function for everyday tasks, while others acknowledge it is rarely used by most purchasers. The watch features a countdown bezel and 20 bar water resistance. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its wearability and practical power reserve.
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