Thorn Watches / Diver$189Current price
SHY036 39mm Titanium PT5000 Diver (Blue)
A 39 mm titanium diver with a ceramic bezel for under $200
SHY036 39mm Titanium PT5000 Diver (Blue)
or Promaster Dive Eco-Drive Light Blue?
Both have a 200 m rating. Choose the Thorn SHY036 at $189 for a titanium automatic with sapphire and a ceramic bezel; choose the Citizen Promaster Dive at $356.28 for solar power that needs no winding, with a mineral crystal.
Citizen / Sport$320.66After codeBefore code$356.28Save $35.62
Promaster Dive Eco-Drive Light Blue
A solar-powered diver that never needs a battery
We may earn a commission if you buy through our links. How this works.
Choose the SHY036 39mm Titanium PT5000 Diver (Blue) for
- Costs $167.28 less at its listed price
- Sapphire crystal
- Smaller case for slimmer wrists: 39 mm vs 44 mm
- Mechanical automatic movement
- Watch Ritual code SEBASTIANBASSOL supplied for $5 off
Choose the Promaster Dive Eco-Drive Light Blue for
- Slimmer: 11 mm vs 12.1 mm
- More wrist presence at 44 mm
- Solar power: no battery changes or winding
- Watch Ritual code SEBASTIANBASSOL tested: $320.66 before shipping
The specs, side by side.
SHY036 39mm Titanium PT5000 Diver (Blue)Promaster Dive Eco-Drive Light Blue
Listed price$189 at Thorn Watches$356.28 at Watches of America
Case diameter39 mm44 mm
Thickness12.1 mm11 mm
Lug-to-lugNot publishedNot published
MovementPT5000 automaticCitizen Eco-Drive E168 (light-powered)
Power reserveNot publishedLight-powered
Water resistance200 m200 m
CrystalSapphire crystal with anti-reflective coatingMineral crystal
Strap / braceletTitanium bracelet with tool-free quick-release linksStainless-steel bracelet, safety fold-over clasp with push-buttons
Who should buy which.
The SHY036 39mm Titanium PT5000 Diver (Blue): Someone who wants an affordable titanium automatic diver with a ceramic bezel in a classic size. Choose a model with a published lug-to-lug span if fit is critical, or a certified dive watch if certification is a purchase requirement.
The Promaster Dive Eco-Drive Light Blue: Someone who wants a genuine dive-rated watch that keeps running without batteries, winding or regular servicing. Skip it if you have a smaller wrist or want sapphire. The Tissot PRX Quartz is a smaller everyday alternative, and a mechanical diver suits buyers who enjoy an automatic movement.
Before you order.
THORN publishes a diameter, thickness and lug width but not a lug-to-lug span, and it does not state an ISO dive certification. The selected variant is the PT5000; THORN also lists SW200 versions at a higher price.
At 44 mm across it wears large; check the size against a watch you own. Citizen uses mineral crystal rather than sapphire, so it is more prone to scratches over the years.
A few good questions.
Should I buy the Thorn Watches SHY036 39mm Titanium PT5000 Diver (Blue) or the Citizen Promaster Dive Eco-Drive Light Blue?
Both have a 200 m rating. Choose the Thorn SHY036 at $189 for a titanium automatic with sapphire and a ceramic bezel; choose the Citizen Promaster Dive at $356.28 for solar power that needs no winding, with a mineral crystal.
Which is cheaper, the Thorn Watches SHY036 39mm Titanium PT5000 Diver (Blue) or the Citizen Promaster Dive Eco-Drive Light Blue?
The Thorn Watches SHY036 39mm Titanium PT5000 Diver (Blue) is listed at $189, against $356.28 for the Citizen Promaster Dive Eco-Drive Light Blue, checked 2026-10-17.
Which is more water resistant, the Thorn Watches SHY036 39mm Titanium PT5000 Diver (Blue) or the Citizen Promaster Dive Eco-Drive Light Blue?
Both are rated to 200 m.
Is there a discount code for the Thorn Watches SHY036 39mm Titanium PT5000 Diver (Blue) or the Citizen Promaster Dive Eco-Drive Light Blue?
SEBASTIANBASSOL is our supplied code for $5 off at Thorn Watches; confirm it applies at checkout. SEBASTIANBASSOL is our supplied code for 10% off at Watches of America; it lowered the Citizen Promaster Dive Eco-Drive Light Blue to $320.66 in our test.
More head-to-heads.
- Thorn SHY036 vs BODERRY Admiral titanium diver
- Thorn SHY042 vs SHY036
- Thorn T018 vs SHY036 titanium divers
- Citizen Promaster Dive vs BODERRY Admiral
- Citizen Sport Automatic vs Promaster Dive
- Tissot Seastar 1000 Quartz vs Citizen Promaster Dive
Specs: THORN Watches product page (checked October 17, 2026) and Citizen product page (checked October 17, 2026). Prices are the listed prices at the store each shop button opens.