Ca. Ø50mm, ca. 78g, 18K gold 'a-goutte', coined band, back elaborately engraved, case and movement with matching number 4803, case maker's mark DCFs, magnificently signed dome with enamelled signature Courvoisier & Cie., extremely rare calibre, steel bridges, early lever escapement, large sapphire jewels, enamel dial (fine hairlines), Breguet hands, movement needs cleaning. The movement version is extremely rare!