47. Excelsior Park. An unusual stainless steel keyless wind lever flyback open face pocket watch with stop switch and Decimal minute Excelsior Park. Chronographe stop watch de torpille et d'artillerie avec fonction retour en vol en acier remontoir au pendant Date: Circa 1920 Movement: Nickel lever, plain flat rimmed balance, No. 3364 Dial: White dial, outer scale for minute divided into 10 parts for decimal timing, subsidiary dial for 30 minute recording, inner spiral scale for Tachymeter upto 3000 Case: Polished hinged back and cuvette, stop slide in band, flyback through crown no,470639 Signed: Dial Size: 56,5mm