Seiko 5KXvsThorn 40mm PT5000 Automatic Dive Watch T023 V3.1 – Upgraded Bracelet Edition

Ref. thorn-40mm-pt5000-automatic-dive-watch-t023-v3·MSRP $199
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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.

5KX

40mm PT5000 Automatic Dive Watch T023 V3.1 – Upgraded Bracelet Edition
Diameter
42.5mm
40mm
Lug-to-Lug
46mm
lowest
46.6mm
Thickness
13.4mm
12.3mm
lowest
Water Resistance
100m
200m
highest
Power Reserve
41h
n/a
MSRP
$350
$199
lowest
Movement
Seiko 4R36
PT5000
Case
5 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Seiko 5KX for its strong lume and value, with many reporting accuracy within +/-5 to 10 seconds per day, though some experience +/-1 second. The 42.5mm case is noted to wear smaller, and the watch offers a comfortable feel for many. Some owners are split on the bracelet quality, with opinions ranging from "cheaper side" with hollow links to "flimsy-feeling" jubilee. A few quality control issues have been reported, including a failed bezel clickspring and misaligned components. The Seiko 5KX is seen by some as a worthy successor to the original SKX, offering an upgraded movement with hacking and hand-winding capabilities, though others lament the loss of ISO certification and a screw-down crown. Overall, owners rate the Seiko 5KX highly for its excellent lume and value proposition, making it a popular choice for everyday wear.
Owners widely praise the Thorn 40mm PT5000 Automatic Dive Watch T023 V3.1 – Upgraded Bracelet Edition for its desirable vintage feel, spot-on proportions, and classic case and dial design, with one owner calling it the best vintage diver homage. The PT5000 movement is noted for its accuracy, with one report of 0/+2 seconds per day, and is described as smooth. The upgraded bracelet is a favorite for many, though some find its riveted construction difficult to adjust and one owner considers its quality lesser compared to another model. On balance, owners rate the Thorn 40mm PT5000 Automatic Dive Watch T023 V3.1 – Upgraded Bracelet Edition highly for its vintage aesthetic and smooth movement at its price point.
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