OMEGA 18'''Chro circa 1915 Steel chronograph wristwatch.... Lot 28

OMEGA 18'''Chro circa 1915 Steel chronograph wristwatch. Round case (registered design 9846). Double hinged snap back. Crown Enameled dial. Railroad minute track. Blued steel fly wings. 18'' Omega SOPB Chro mechanical movement. Brown leather strap with chrome-plated buckle. Diameter: 46mm This is Omega's first wrist chronograph model with a push-button system at 6 o'clock, as on our model, or with the push-button integrated into the crown. The smaller, flatter movement than the 19 Chro made this wristwatch possible as early as 1906.