Editorial
The Fifty Fathoms Automatique is the full-size expression of Blancpain's dive lineage, running the in-house caliber 1315 with a 120-hour power reserve in a 45mm steel case rated to 300 meters. It traces a direct line back to the 1953 original, which predates the Submariner and set the template for the modern dive watch. For a collector who wants depth and historical legitimacy in the same piece, there is no stronger argument in the category.
Blancpain introduced the Fifty Fathoms in 1953 in collaboration with French navy diver Robert Maloubier, making it the first watch purpose-built to modern dive watch specifications. It established conventions the entire category later adopted: rotating bezel, luminous dial, screw-down crown, water resistance measured in fathoms. The reference went dormant during the quartz era along with most of Blancpain's catalog, and was revived in the early 2000s as the brand rebuilt under the Swatch Group.
The modern 5015 Automatique arrived in 2007 as the flagship of that revival, offering the historical connection to 1953 with a fully contemporary movement architecture. Caliber 1315 was developed specifically for the Fifty Fathoms line and remains one of the more technically serious in-house dive movements available.
At 45mm, this is a large watch and will wear large on smaller wrists. Blancpain made no attempt to slim it down for modern taste, so try it on before committing. The 5015 reference spans nearly two decades and includes multiple dial and strap variations; confirm exactly which configuration you are buying, since some combinations are harder to resell than others.
Earlier examples from 2007 to 2012 have had isolated reports of lume degradation on the chapter ring, worth inspecting under a loupe. The sapphire exhibition caseback on the 5015 is a nice feature but makes the case slightly more vulnerable to impact from behind than a solid caseback. Gray market pricing on this reference is competitive, but verify the full documentation set as it affects both serviceability and resale.
