The Aqucos diving watch is a more focused dive instrument than the Fifty Fathoms; secondary prices are modest because brand recognition for this specific reference is lower, offering collectors a technically capable watch at an accessible entry.
The Aquos Concept gives you the 1315 caliber, 300m water resistance, and the full Blancpain dive pedigree in a 38mm case that actually fits most wrists. It runs quietly beneath the Fifty Fathoms name but shares everything that matters mechanically. If the 45mm Fifty Fathoms is too much watch, this is the honest alternative.
Blancpain launched the Aquos Concept as a smaller complement to the Fifty Fathoms, targeting collectors who wanted serious dive capability without the oversized case that defined the flagship. The 38mm diameter and 10.7mm lug-to-lug proportions made it genuinely wearable for dress-adjacent occasions alongside dive duty. At introduction it was positioned as an entry into the Blancpain dive family, though the movement inside is identical to what powers the more expensive FF references.
Production has continued without dramatic revision since 2012, which speaks to a loyal, quiet following rather than aggressive marketing. It never received the cultural spotlight of the Fifty Fathoms, and Blancpain has done little to change that.
The 5050-1110-NABA designation is specific: verify dial color, bezel insert material, and strap configuration against the reference code before buying, as variants exist and sellers sometimes conflate them. Pre-owned examples occasionally show bezel insert wear that is more visually prominent on the 38mm size than on the larger Fifty Fathoms. The crown and case finishing on older examples can show polishing damage from amateur service or overcleaning.
Blancpain service history matters here because the 1315 is a proprietary movement with limited independent servicing options outside authorized centers. Watch for cases that have been sized down or altered, as the 38mm proportions depend on an intact case profile.
The Aquos Concept trades at a meaningful discount to the Fifty Fathoms despite sharing the same 1315 movement, which makes it genuinely interesting for buyers who prioritize value over brand recognition. Pre-owned prices have been stable without the speculative pressure that affects the FF line. Grey market supply is modest, so patience pays at auction or through established pre-owned dealers.
The Caliber 1315 is a Blancpain in-house automatic with a 120-hour power reserve and a column wheel chronometer-grade construction. Recommended service interval is every 5 to 7 years, and Blancpain authorized service centers are the reliable option for the 1315 given the proprietary components. Budget approximately $800 to $1,200 for a full service through the manufacturer network.
Community + OSINT signals haven’t landed for this reference yet. We don’t publish a rating against zero signal — the number would mean nothing. Editorial body + caliber + market value still surface above; ratings appear once the signal corpus does.
Cal. 1315 with three visible barrels through the caseback is the primary movement verification for the Aqua Lung collaboration.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| caseback | Cal. 1315 three-barrel arrangement | Three barrels clearly visible through sapphire caseback, all present and undamaged | Two-barrel movement visible, or an opaque caseback that cannot be verified without disassembly |
| dial | Aqua Lung co-branding presence | Both Blancpain signature and Aqua Lung logo present on the dial as specified for this collaboration | Blancpain-only dial without Aqua Lung logo indicating a dial swap to a standard Fifty Fathoms dial |
| case | Bezel numeral typography |
Editorial estimate. Actual prices vary by condition, date, and box/papers status. Live pricing data is in development.
| 1953-style numeral proportions on the bezel insert, consistent with vintage Fifty Fathoms design language |
| Modern Fifty Fathoms bezel insert with different numeral spacing or proportion |
