Details
A nickel cased open faced keyless lever three second timer, Heuer Mikrograph,
white enamel dial signed Heuer Mikrograph, Pat.73392/93, calibrated 1-3, each third divided into 100th's of a second, frosted gilt movement with fast beating escapement, plain case, diameter 57mm.
white enamel dial signed Heuer Mikrograph, Pat.73392/93, calibrated 1-3, each third divided into 100th's of a second, frosted gilt movement with fast beating escapement, plain case, diameter 57mm.