Ratio FreeDiver Professional Sapphire RTFvsSeiko DressKX

Ref. ratio-freediver-professional-sapphire-blue-sunray-dial-automatic-rtf0013-500m-mens-watch·MSRP $140
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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.

FreeDiver Professional Sapphire RTF

DressKX
Diameter
42mm
40mm
Lug-to-Lug
n/a
44.6mm
Thickness
15.5mm
11.5mm
lowest
Water Resistance
500m
highest
100m
Power Reserve
n/a
41h
MSRP
$140
lowest
$315
Movement
Miyota 8215
Seiko 4R36
Case
5 specsCrystal & Dial
2 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Ratio FreeDiver Professional Sapphire RTF for its exceptional value for money. The watch is noted for its quality construction, with bezels described as having a great feel and minimal back play. One owner highlights an Abyss black dial, sapphire crystal with AR coating, and screw-down crown, built for daily wear with 200m water resistance. On balance, the consensus is that the Ratio FreeDiver Professional Sapphire RTF is a highly recommended watch due to its impressive quality and great price point.
Owners widely report the Seiko DressKX offers excellent value and a comfortable 22mm bracelet. Accuracy with the 4R36 movement is variable, with most owners experiencing +/-5 to 10 seconds per day, though the movement's official tolerance is +/-40 seconds per day. Some owners have noted component failures like bezel issues or misaligned parts, while others praise its accuracy. The Seiko DressKX is seen by some as a less serious tool watch than its predecessor due to the lack of a screw-down crown and ISO rating, though others prefer its modern features and warranty. Overall, owners rate the Seiko DressKX highly for its value and comfortable bracelet, despite variable accuracy.
The clean dial and versatile dressy look are praised. The overall thickness and handset are points of contention.
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