Open face 18k yellow gold Duplex pocket watch, Switzerland around 1860, key winding, engine-turned 2-cover gold case with à-goutte-closure, fluted edge, two piece construction enamel dial hairlines with Roman numerals, blued steel hands later, gold plated bar- construction-movement, compensation-balance with Breguet-hairspring, diameter approx. 48 mm, weight approx. 77g, overhaul recommended at buyer's expense, condition case 2-3, condition movement 2