Thorn Thorn TitaniumvsSeiko 5KX

Thorn Titanium
ThornThorn Titanium

Ref. thorn-pt5000-automatic-39mm-titanium-watch-shy036·MSRP $185

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Thorn Thorn Titanium at true scale

Thorn Titanium

Seiko 5KX at true scale

5KX

Diameter

39mm

42.5mm

Lug-to-Lug

44.4mm

lowest

46mm

Thickness

12.1mm

lowest

13.4mm

Water Resistance

200m

highest

100m

Power Reserve

n/a

41h

MSRP

$185

lowest

$350

Movement

PT5000

Seiko 4R36

Case

6 specs
Diameter
39mm
42.5mm
Thickness
12.1mm
13.4mm
Lug-to-Lug
44.4mm
46mm
Lug Width
20mm
22mm
Material
Titanium
Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$185
$350
Keep your wishlist and collection together in the appExplore the app

Reviews

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

Thorn Titanium

Owners widely praise the Cronos Thorn PT5000 Automatic 39mm Titanium Watch SHY036 for its value, with one owner calling it the best modern explorer homage under $170. The tool-free bracelet adjustment links are considered a game-changer, and the 39mm titanium case is noted as unobtrusive and keeping the watch under 11mm thick. The PT5000 movement's accuracy is a point of varied owner experience, ranging from exceptional timekeeping comparable to quartz, to running 2.8 seconds fast per day, or gaining 2.5 minutes over two weeks. Some owners express skepticism or disappointment with the PT5000 movement, with one finding it noisy and finicky, and another preferring Seiko alternatives. Overall, owners rate the Cronos Thorn PT5000 Automatic 39mm Titanium Watch SHY036 highly for its excellent value and practical bracelet features, despite mixed experiences with the PT5000 movement's accuracy.

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.