The Wristwatch Field Guide

Ancon Sea Shadow III Bronze

SEA383

The Ancon Sea Shadow III Bronze is a current-production diver watch with a cusn8 marine bronze case. It measures 43.5 mm across, 16.5 mm thick, and is water resistant to 500 m. Inside is the ETA 2824-2 automatic movement. Complications: Time only. Priced from $760 (approx). Brand origin: United States.

Titanium, ceramic, and bronze diver watchesBronzeDiversUnder $5,000
Reference
SEA383
Type
Diver
Price
$760 · approx
Case diameter
43.5 mm
Thickness
16.5 mm
Lug-to-lug
–
Water resistance
500 m
Weight
–
Origin
United States
Movement
Automatic
Caliber
ETA 2824-2
Power reserve
–
Complications
Time only
Material
Bronze
Grade / type
CuSn8 marine bronze
Colour
–
Hardness
–
Construction
Assembled
Surface treatment
–
Caseback
–
Nickel-free
Not verified (contact-point materials not all confirmed)
Bracelet / strap
Sold on a strap; no bronze bracelet.
Matching bracelet
–
Crystal
Sapphire, 4mm
Display back
–
Dial
SEA383 dial variant (representative)
Lume
Super-LumiNova, lume-filled bezel
Availability
Offered
Status
Current (between batches)
High confidence Verified Jul 2026 Source: SeriousWatches Maker / listing ↗
Facts are free to cite with a link.
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Alternatives to the Ancon Sea Shadow III Bronze

Phoibos Apollo Titanium 300MPhoibosApollo Titanium 300M$57541.0 mm12.5 mm thick130 gDiversame category · same style · similar price · similar sizeTimex Deepwater Reef Titanium 200TimexDeepwater Reef Titanium 200$57941.0 mm13 mm thick81.89 gDiversame category · same style · similar price · similar sizeTimex Expedition Pioneer Titanium AutomaticTimexExpedition Pioneer Titanium Automatic$57941.0 mm13.5 mm thickDiversame category · same style · similar price · similar size
AquaticoSuper Marine Tritium$59944.0 mmDiversame category · same style · similar price · similar sizeMaratac LSA Homage 300M DiverMaratacLSA Homage 300M Diver$59941.0 mm14 mm thick51 gDiversame category · same style · similar price · similar size
VariusSeek$59942.0 mm13.4 mm thick130 gDiversame category · same style · similar price · similar size

Frequently asked questions

What is the case material of the Ancon Sea Shadow III Bronze?

The Ancon Sea Shadow III Bronze has a cusn8 marine bronze case. This is confirmed against the maker spec.

What size is the Ancon Sea Shadow III Bronze?

It is 43.5 mm in diameter, 16.5 mm thick, and water resistant to 500 m.

How much does the Ancon Sea Shadow III Bronze cost, and is it available?

It is current-production and lists from $760.

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