A gentleman's nickel cased single button chronograph wristwatch, circa 1920,

細節
A gentleman's nickel cased single button chronograph wristwatch, circa 1920,
black enamel dial signed Chronometre Philippe Watch, outer telemetric scale annd inner spiral scale, subsidiary constant seconds and minute recording dials, nickel plated movement signed Philippe Watch, circular case with wire lugs and snap on back, distressed, diameter 39mm.