56. Ed Koehn. A fine 18k gold openface keyless split seconds chronograph watch Ed Koehn. Beau chronographe de poche à cadran ouvert en or jaune 18K (750) avec fonction rattrapante remontoir au pendant Date: Circa 1915 Movement: Nickel lever, 23 jewels bi-metallic compensation balance, 8 adjustments, polished and bevelled steel work, no.19241 Dial: White enamel, outer 5th seconds and minutes, Arabic numerals, subsidary dials for constant seconds and 60 minute recording, blued steel spade hands and blued steel chronograph hands Case: Polished hinged back and cuvette, monogram to back, no.19220 Signed: Case and movement Size: 47.5mm Weight: 76,56g