The flyback dive chronograph, in steel on a NATO.

Three things make the F385 more than a chronograph module bolted to a dive watch. A column wheel gives the pushers an even, mechanical feel. A vertical clutch means the chronograph seconds hand starts without the small stutter a horizontal clutch produces. And flyback means that with the timer running, one press zeroes and restarts it in the same motion, which is what a diver timing consecutive stops needs. It runs about 50 hours and uses a silicon balance spring.

The steel case with the ceramic bezel is the Bathyscaphe formula, and the meteor grey dial is the quieter face compared with the black ceramic version elsewhere on this page. The NATO strap is the dealer’s configuration; Blancpain also ships this reference on canvas and on a bracelet.

This is a regular Amazon listing from an independent dealer, Luxor Watches on the day we read it, with Amazon’s 30-day return window; it is not a Luxury Stores pre-owned unit. The second button opens the live search for Bathyscaphe chronographs in case this one has sold.

Bathyscaphes have resold for under new and close to what pre-owned buyers paid, sometimes more, sometimes less; that is a pattern, not a promise, and nothing here is investment advice.