Ca. Ø45mm, ca. 48g, 18K gold, fantastic enamel work with gold inlays, case and movement with matching number 4062164, signed special calibre, quality 'Extra', gold wheels, special fine adjusting device, exceptionally large balance, unique green enamel dial with double signature Longines & Riganti, gold Breguet numerals, gold Art Déco hands, in fantastic condition, in working order, absolute rarity and possibly a unique piece!