The Fifty Fathoms Automatique is the civilian production descendant of the 1953 reference co-developed with the French Navy, making it one of the few current dive watches with an unbroken specification lineage to the original professional tool.
Pre-owned watches trade across a wide condition spectrum. These ranges are typical for the secondary market.
The Fifty Fathoms Automatique is one of the better-value in-house dive watches at this tier; secondary prices are stable because the watch retails near the top of this range without significant markup.
Editorial estimate, 2026 Q2. Actual prices vary by condition, date, and box/papers status.
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 42mm 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 42mm, this still wears substantially on smaller wrists, closer to a traditional dive-watch proportion than a modern slimmed-down sport watch. 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.
The 5015 Automatique trades in the $10,000 to $14,000 range on the secondary market depending on condition, dial variant, and whether the original bracelet or strap is included. It holds value steadily rather than appreciating sharply, which means it is reasonably priced for what it delivers mechanically. New examples list around $17,000 to $18,000 at authorized dealers, so the gray market discount is meaningful.
Demand is consistent among serious collectors and tends not to spike or crater with fashion cycles.
Caliber 1315 is a robust movement with a five-day power reserve and a silicon balance spring, and Blancpain recommends service intervals of around five years for a watch used regularly in water. Service is best handled by Blancpain directly or by an independent with documented experience on the 1315, as the silicon hairspring requires specific tools and handling protocols different from conventional hairsprings. Budget roughly $800 to $1,200 for a full service including pressure testing, which is non-negotiable for a dive watch intended to be used as one.
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The Fifty Fathoms Automatique is less replicated than the Submariner but attracts increasing attention as secondary values rise. Movement quality and dial authenticity are the primary concerns.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| dial | Printed text and applied index quality | Applied metal indices with correct dimensions; all text printed in crisp Blancpain typeface; the "Fifty Fathoms" signature is in a specific italic font with correct weight | Fuzzy text printing under magnification; applied indices with uneven heights or gap between index foot and dial surface; incorrect font weight on signature |
| case | Rotating bezel ratchet feel and locking | The bezel rotates counterclockwise only with 60 distinct clicks; each click is firm and the bezel does not back-rotate under normal handling | Bezel that rotates in both directions; loose or mushy click feel; bezel that can be nudged backward with light pressure |
The FF Automatique 5015 is the 45mm flagship dive variant of the Fifty Fathoms line, carrying caliber 1315 with a 5-day (120-hour) power reserve via three mainspring barrels. The sapphire bezel insert is distinctive to this specific variant. Size and movement are the primary authentication anchors.
Up 9% over the past 90 days
Based on eBay sales, last 12 months
| movement | Cal. 1315 identification | Cal. 1315 runs at 28,800bph with 120-hour power reserve via twin barrels; silicon balance spring; rhodium-plated finishing on bridges; visible via caseback | Non-Blancpain movement; incorrect power reserve for stated Cal. 1315; absence of silicon spring color on balance |
| caseback | Exhibition caseback and movement view | Sapphire caseback displays Cal. 1315 with correct Blancpain decoration; caseback engraved with reference and serial; water resistance crown visible | Non-Blancpain movement visible through caseback; caseback with incorrect engraving; reference number inconsistent with the Automatique variant |
| dial | Moisture indicator presence | A small moisture detector disc is present under the crystal in the original specification; it changes color if water has entered the case | Moisture indicator absent on a stated original example; incorrect disc color suggesting water ingress history |
| crystal | Sapphire crystal with AR coating | Domed sapphire crystal with blue-green AR coating; coating is uniform across the surface and changes in tint at different angles | Flat crystal where dome is expected; mineral crystal; no AR coating; incorrect AR tint color |
| Era | Description | Identifiers |
|---|---|---|
| 2007 to present | Dark blue or black dial with large applied luminescent indices. The case is 45mm -- noticeably large compared to the Bathyscaphe. "Fifty Fathoms" in script at 9 o'clock, "BLANCPAIN" at 12. Applied Arabic numerals for 12, 6, 9 on most variants. Date window at 4:30. The unidirectional bezel uses a sapphire crystal insert (not aluminum or ceramic), making it immediately distinctive. |
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