Heuer. A rare stainless steel manual wind triple calendar chronograph wristwatch with moon phase

Heuer. A rare stainless steel manual wind triple calendar chronograph wristwatch with moon phase
Date: Circa 1955
Movement: 17-jewel Valjoux Cal.88 manual wind, No.550237
Dial: Two-tone silvered, gilt dot and Arabic numeral hour markers, outer 1/5th second and calendar markers, day and month apertures below 12, large subsidiary dials at 3, 6 and 9 for constant seconds, 30 minute and 12 hour recording, moon phase at 6, gilt leaf hands, blue arrow tipped calendar hand
Case: Brushed and polished round, snap on back, quick set buttons at 9 and 10, twin rectangular chronograph buttons, No.81847
Strap/Bracelet: Brown leather
Buckle/Clasp: Steel buckle
Signed: Case, dial & movement
Size: 35mm