Wakmann Triple Calendar Chronograph Wristwatch

Wakmann Triple Calendar Chronograph Wristwatch, reference 73.1308.21, chrome-plated case and stainless steel back, black dial with concentric turned white subsidiary dials for thirty-minute, twelve-hour, and constant seconds, outer day-of-the month track with red-tipped hand, day of the week and month apertures below 12, and red chronograph hand, manual-wind Valjoux 730 column wheel movement, interior case back marked "Charles Gigandet," with period operating instruction booklet, dia. 39 mm.