An open faced split seconds keyless lever chronograph pocket watch, Omega Olympic, circa 1970,

細節
An open faced split seconds keyless lever chronograph pocket watch, Omega Olympic, circa 1970,
black dial signed Omega Olympic, Arabic numerals, subsidiary seconds and subsidiary 30-minute recording dial, outer scale calibrated to 10ths of a second, signed frosted gilt movement numbered 1908557, with fast oscillating balance, micrometer adjustment to the regulator, steel chronograph work, nickel dust cover, patinated black case with buttons in the crown and band, diameter 63mm, with original red plastic case inscribed Omega.