A gold chronograph wristwatch with register, pulsemeter and 24 hours, Leroy & Fils, no. 152351

18k, gilt lever movement, bi-metallic compensation balance, gold cuvette, white enamel dial, arabic numerals, two subsidiary dials indicating constant seconds and 30 minute register, inner ring calibrated for 24 hours, circular hinged case with hinged lugs, converted from a pocketwatch, dial and cuvette signed, case and cuvette stamped JG, with 18k gold buckle, stamped JP.