The Wristwatch 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 marine 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.

Titanium, ceramic, and bronze diver watchesBronzeDiversUnder $5,000
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
Material
Bronze
Grade / type
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
Matching 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 is the case material of the Tandorio TD239M CuSn8 Bronze Willard Captain Diver?

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

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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