An open faced stainless steel keyless lever split 1/10th second stopwatch, Longines, 1970's,

細節
An open faced stainless steel keyless lever split 1/10th second stopwatch, Longines, 1970's,
silvered dial signed Longines, black Arabic numerals, subsidiary constant seconds and minute recording dials, black outer scale calibrated 1-60, orange seconds hand with 0-9 extension, signed 23-jewel nickel plated movement numbered 14701318, fast oscillating bimetallic compensation balance with micrometer adjustment to the regulator, dust cover, case with signed and numbered screw back, diameter 65mm.