Seiko 5KXvsThorn Titanium Dive Watch

Titanium Dive Watch
ThornTitanium Dive Watch

Ref. thorn-titanium-39mm-automatic-dive-watch·MSRP $189

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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.

Seiko 5KX at true scale

5KX

Thorn Titanium Dive Watch at true scale

Titanium Dive Watch

Diameter

42.5mm

39mm

Lug-to-Lug

46mm

n/a

Thickness

13.4mm

12.1mm

lowest

Water Resistance

100m

200m

highest

Power Reserve

41h

n/a

MSRP

$350

$189

lowest

Movement

Seiko 4R36

PT5000

Case

6 specs
Diameter
42.5mm
39mm
Thickness
13.4mm
12.1mm
Lug-to-Lug
46mm
n/a
Lug Width
22mm
20mm
Material
Stainless Steel
Titanium metal
Water Resistance
100m
200m

Crystal & Dial

3 specs
Crystal
Hardlex
Sapphire
Dial Color
Blue
n/a
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
Seiko 4R36
PT5000
Power Reserve
41h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$350
$189
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Reviews

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

Seiko 5KX

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.

Thorn Titanium Dive Watch

Owners widely praise the Thorn Titanium 39mm Automatic Dive Watch for its exceptional lightness and comfort due to its titanium construction, with many highlighting the impressive finishing and the "game-changer" tool-free bracelet adjustment system. The lume is also frequently called out as superior. However, some owners find the watch wears a little small, and one owner returned it due to a ghost-date issue and the watch stopping once every 24 hours, with another reporting the watch stopped when the seconds hand reached 60. The design is described by one owner as somewhat uninspired, aside from the custom dial, due to common mod parts. Overall, owners rate the Thorn Titanium 39mm Automatic Dive Watch highly for its wearability and bracelet system.