Blancpain Rolls Ato 18kt 750 Gold Automatic Men's Watch / 1930er Years Vintage

  

The watch features a silvered dial with blued pear-shaped hands, mustard brown Arabic hour markers, a small seconds at 6 o'clock, an interior railway minute track, and a solid 18kt hinged watch case. Driven by the desire to incorporate an automatic movement into a chic, handy ladies' watch, the Rolls Ato was born. It's worth noting that it winds up by oscillating motion and moves with the vibration; The caliber is just loose in the case. This piece of experimental watchmaking history is the result of a collaboration between Frédéric-Emile Blancplain and Léon Hatot.

Of the two commercially available versions of this model, this is the "large" men's version, rather than the 17mm "small" version.