The Bronze Field Guide

Tandorio TD239M CuSn8 Bronze Willard Captain Diver

The Tandorio TD239M CuSn8 Bronze Willard Captain Diver is a current-production diver watch with a cusn8 bronze case. It measures 44.0 mm across, 14 mm thick, and is water resistant to 200 m. Inside is the Seiko NH35A automatic movement, with 41 hours power reserve. Complications: Date. Priced from $164. Brand origin: China.

Bronze diver watchesCuSn8Skin-safe backDiversUnder $500
Reference
Type
Diver
Price
$164
Case diameter
44.0 mm
Thickness
14 mm
Lug-to-lug
Water resistance
200 m
Weight
Origin
China
Movement
Automatic
Caliber
Seiko NH35A
Power reserve
41 hours
Complications
Date
Ceramic
CuSn8 marine bronze
Colour
Hardness
Construction
Assembled
Surface treatment
Caseback
Steel
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Brown leather strap
Ceramic bracelet
Crystal
Sapphire
Display back
No
Dial
Black or white with date at 3
Lume
Super-LumiNova
Availability
Offered
Status
Current
Medium confidence Verified Jul 2026 Source: Tandorio official store Maker / listing ↗
Facts are free to cite with a link.
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Frequently asked questions

What bronze alloy is the Tandorio TD239M CuSn8 Bronze Willard Captain Diver?

The Tandorio TD239M CuSn8 Bronze Willard Captain Diver has a cusn8 bronze case, though its caseback is steel. It is recorded at medium confidence pending a maker-stated alloy.

What size is the Tandorio TD239M CuSn8 Bronze Willard Captain Diver?

It is 44.0 mm in diameter, 14 mm thick, and water resistant to 200 m.

How much does the Tandorio TD239M CuSn8 Bronze Willard Captain Diver cost, and is it available?

It is current-production and lists from $164.

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