The Bronze Field Guide

San Martin CuSn8 Bronze Diver 42mm

SN0043Q

The San Martin CuSn8 Bronze Diver 42mm is a current-production diver watch with a cusn8 bronze case. At 100 g it sits among the lighter diver watches in the guide, and is priced well under the $599 median for the category.

All San Martin watchesBronze diver watchesCuSn8Skin-safe backDiversUnder $500
Price
$242
Alloy
CuSn8 marine bronze
Weight
100 g
Water resistance
200 m
Caseback
Steel
Reference
SN0043Q
Type
Diver
Case diameter
42.0 mm
Thickness
11.6 mm
Lug-to-lug
52 mm
Origin
China
Movement
Automatic
Caliber
PT5000 (or SW200)
Complications
Time only
Construction
Assembled
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Leather strap
Crystal
Sapphire with AR coating
Display back
No
Dial
Matte black, matte green, sunburst blue, mother-of-pearl
Dial colours
Black White Blue Green
Lume
BGW9 / C3 Super-LumiNova
Availability
Offered
Status
Current (batch production)
Not published
Power reserve, Colour, Hardness, Surface treatment, Bronze bracelet
High confidence Verified Jul 2026 Source: San Martin
Facts are free to cite with a link.
See it in the interactive guide

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Frequently asked questions

What bronze alloy is the San Martin CuSn8 Bronze Diver 42mm?

The San Martin CuSn8 Bronze Diver 42mm has a cusn8 bronze case, though its caseback is steel. This is confirmed against the maker spec.

What size is the San Martin CuSn8 Bronze Diver 42mm?

It is 42.0 mm in diameter, 11.6 mm thick, 52 mm lug to lug, and water resistant to 200 m.

How much does the San Martin CuSn8 Bronze Diver 42mm weigh?

About 100 g.

How much does the San Martin CuSn8 Bronze Diver 42mm cost, and is it available?

It is current-production and lists from $242.

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