Longines. A rare and early 18K gold manual wind single button chronograph wristwatch

Longines. A rare and early 18K gold manual wind single button chronograph wristwatch
Date: Circa 1924
Movement: 18-jewel Cal.13.33 manual wind, column wheel chronograph, No.4223592
Dial: White enamel, black Arabic numerals, outer 1/5th second track, further outer blue, black and red tachymetre scales, subsidiary seconds at 9, 30 minute recording at 3, blued steel hands, centre chronograph hand
Case: Polished round, snap on back, inner hinged cuvette, fixed wire lugs, single chronograph button in crown, No.4223592
Strap/Bracelet: Black leather
Buckle/Clasp: Signed plated buckle
Signed: Case, dial & movement
Size: 34mm