The rose gold Fifty Fathoms line covers four Blancpain families: the 45 mm Fifty Fathoms Automatique, the 43 mm Bathyscaphe, the 38 mm Bathyscaphe, and the 43 mm Bathyscaphe Chronograph Flyback. Each uses an 18K red gold case that Blancpain and most dealers market as rose gold, and each keeps the 300 meter water resistance that defines the collection. The reference prefix tells you which one you are looking at, with 5015, 5000, 5100, and 5200 marking the four lines.
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Which Fifty Fathoms models come in rose gold?
- Fifty Fathoms Automatique, 45 mm, reference 5015, with a sapphire bezel insert and a black or blue sunburst dial.
- Fifty Fathoms Bathyscaphe, 43 mm, reference 5000, with a ceramic bezel and a cleaner, more architectural case.
- Fifty Fathoms Bathyscaphe, 38 mm, reference 5100, the smallest rose gold option and the easiest to wear on a slim wrist.
- Bathyscaphe Chronograph Flyback, 43 mm, reference 5200, with two pushers and a vertical clutch chronograph.
The Automatique is the purest expression of the 1953 original. The Bathyscaphe trio, by contrast, targets buyers who want dive-watch function in a dressier package.
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What specs should you expect from a rose gold Fifty Fathoms?
The 45 mm Automatique and the 43 mm Bathyscaphe both run Calibre 1315, a three-barrel automatic with a 120 hour power reserve and a silicon balance spring. The 38 mm Bathyscaphe steps down to Calibre 1150, which still delivers 100 hours. The Chronograph Flyback uses Calibre F385, a column-wheel automatic with roughly 50 hours of reserve.
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All four share a sapphire crystal, a unidirectional or capped dive bezel, and a screw-down crown. Water resistance sits at 300 meters across the board, and the Automatique adds a helium escape valve on some variants.
How does rose gold change the look and the weight?
Rose gold shifts the Fifty Fathoms from a tool watch into a jewelry-adjacent object, and the warm copper tone reads very differently against a black dial than steel does. It also adds mass, so a 45 mm gold Automatique feels noticeably heavier than the steel version on the wrist. That weight is one of the fastest ways to tell a solid gold case from a gold-plated copy.
What do buyers check on a rose gold Fifty Fathoms replica?
Color tone comes first. Good rose gold plating sits between pink and copper, with no orange cast under daylight, and the case and bezel should match exactly. Plating thickness matters more than the base metal, since thin flash coatings wear through at the lugs and crown guards within months.
Next, check the engraving depth on the caseback, the crispness of the bezel teeth, and the lume plot alignment at 12. A movement beating at 28,800 vibrations per hour is the norm for the Calibre 1315 layout, and a slow, choppy sweep is a warning sign. Weight is the tiebreaker: a gold-look case that feels hollow rarely holds up.
Rose gold, steel, or titanium: which Fifty Fathoms should you pick?
Rose gold suits collectors who want the Fifty Fathoms as a statement piece and accept the higher maintenance of a soft metal. Steel remains the everyday choice and hides scratches best. Titanium sits in the middle, offering a darker grey tone and less weight, though it never delivers the warmth that makes the gold versions stand out.