-Os Slide Rules

Material stainless steel (316L) Glass mineral Surface matt Water resist 3 ATM Glass back yes Size 47.5 mm Crown not screwed Band leather Strap width 22 mm

Manufacturer Dubois & Dépraz, Horlogère Micromécanique Suisse (since 1902) Caliber DD 2020 Date no Weekday no System automatic Energy mechanical Jewels 51 Vibrations 28'800 A/h Special The rotating bezel to perform general calculation

Material stainless steel (316L) Glass mineral Surface matt Water resist 3 ATM Glass back yes Size 47.5 mm Crown not screwed Band leather Strap width 22 mm