A stainless steel automatic centre seconds wristwatch with power reserve, Jaeger-LeCoultre, circa 1960

Geneva striped hammer automatic nickel lever movement, mono-metallic compensation balance, black dial, applied arabic and baton numerals, centre seconds, fan-form aperture beneath 12 o'clock for 40-hour power reserve, circular case, screwed down case back, dial and movement signed, case back signed LeCoultre Co