3022. H.C. Ahlers. A fine 14K gold openface keyless split seconds chronograph Date: Circa 1920 Movement: Nickel lever, bi-metallic compensation balance, Breguet overcoil balance spring, adjusted, swan neck regulator, wolf's tooth winding, sugar tong split seconds mechanism, no.7534 Dial: White enamel, Arabic numerals, outer 5th second and minute track, subsidiary dial for constant seconds and 30 minute recording, blued steel spade hands and centre blued steel and gilt split second chronograph hands Case: Polished hinged back and cuvette, No.7534, Monagram to back Signed: Dial and movement Size: 47mm Weight: 74,04g