The Titanium Field Guide

Blancpain Fifty Fathoms 70th Anniversary Act 3

5901 5630 NANA

The Blancpain Fifty Fathoms 70th Anniversary Act 3 is a current-production diver watch with a bronze (grade not stated) bronze gold case. The maker states no nickel-bearing steel at any skin-contact point, across the case, caseback and bracelet.

All Blancpain watchesExotic-material diver watchesDisplay back
Material
Bronze gold
Grade / type
Bronze (grade not stated)
Water resistance
300 m
Reference
5901 5630 NANA
Type
Diver
Case diameter
41.3 mm
Origin
Switzerland
Movement
Automatic
Caliber
1154.P2
Power reserve
100 hours
Complications
Time only
Construction
Assembled
Finish technology
Natural finish
Caseback
Bronze gold
Nickel-free
Maker states none
Bracelet / strap
NATO/textile and additional straps
Crystal
Sapphire
Display back
Yes
Dial
Black, MIL-SPEC style with moisture indicator
Dial colours
Black
Lume
Super-LumiNova
Availability
Offered
Status
Current (limited edition, 555 pieces)
Not published
Price, Thickness, Lug-to-lug, Weight, Colour, Hardness, Surface treatment, Matching bracelet
High confidence Verified Jul 2026 Source: Blancpain / Monochrome
Facts are free to cite with a link.
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Frequently asked questions

Is the Blancpain Fifty Fathoms 70th Anniversary Act 3 nickel-free?

On the maker's published specification, no nickel-bearing steel touches the skin: a bronze (grade not stated) bronze gold case with a bronze gold caseback, plus a non-steel crown and strap. That is what the guide records rather than a test of the watch, so confirm the contact points with the maker before buying if you react to nickel.

What is the case material of the Blancpain Fifty Fathoms 70th Anniversary Act 3?

The Blancpain Fifty Fathoms 70th Anniversary Act 3 has a bronze (grade not stated) bronze gold case with a bronze gold caseback. This is confirmed against the maker spec.

What size is the Blancpain Fifty Fathoms 70th Anniversary Act 3?

It is 41.3 mm in diameter, and water resistant to 300 m.

How much does the Blancpain Fifty Fathoms 70th Anniversary Act 3 cost, and is it available?

It is current-production; the guide does not list a price for it.

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