MINERVA SINGLE-BUTTON CHRONOGRAPH ENAMEL
Minerva, Swiss, case No. 340240. Made circa 1930.
Fine, large, chromed wristwatch with single-button chronograph,
register and tachometer.
Three-body, polished, steel inclined bezel, curved lugs with
fixed wire bars, olive-shaped button at 2 for the start/stop and
return-to-zero functions of the chronograph, hinged back.
White enamel with black Arabic numerals, outer minutes and
fifths of a second divisions, outer red and blue tachometer scale,
subsidiary seconds and 30-minute registers. Blued steel Breguet
17 ''', rhodium plated, 17 jewels, straight-line lever escapement,
cut bimetallic compensation balance, Breguet balance spring,