Junghans 688.10; Valjoux 7734

Caliber Valjoux 7734; Junghans 688.10; Junghans olympic

Chronograph; date; bidirectional bezel; 17 Jewels

Junghans-688.10-Front.jpg

Junghans 688.10; Valjoux 7734; Junghans olympic; Front

Junghans-688.10-Werk-movement.jpg

Junghans 688.10; Valjoux 7734; Junghans olympic; movement

Junghans-688.10-Rückseite-back.jpg

Junghans 688.10; Valjoux 7734; Junghans olympic; back

  • Type: men´s wristwatch Chronograph
  • Manufacturer on dial: Junghans
  • Trademarks/imprint:  6-pointed star with black star with silver J; JUNGHANS; below center: olympic, 17 JEWELS; at 6: SWISS MADE; Back: STAINLESS STEEL; WATER RESISTANT; SHOCK RESISTANT; SWISS MADE; 3 ATU; in the middle: RAG 25 Jahre
  • Number of jewels: 17
  • Escapement: lever escapement
  • Balance staff: Nickel-Ringbalance
  • Shock protection: Incabloc
  • Particularity: Chronograph
  • Beats per hour: 18.000 A/h
  • Dimensions of movement: 14“‘
  • Time of production: 1969 – 1978
  • Functions: hand winding; Date quick set between 22:00 and 24:00; Chronograph: Chrono center hand 60 sec; at 3: 30 min
  • Display: hour, minute, permanent second at 9; Chronograph with Tachymeterscale; Date (at 6)
  • Dial: silver; recessed, polished totalizers at 3 and 9; printed black bar indexes with a small luminous dot; longer, black, printed minutes, with 1/5 dashes in between; outside black tachymetric scale 220 - 60 (from 3 to 12); red telemeter scale 0 - 5 (12 - 3); Date at 6
  • Hands: Sword with square neck; Chrono center: orange; totalizer: like second hand
  • Case shape: cushion
  • Case diameter (mm): 38,8
  • Case material: Steel, Sunray; polished edges
  • Back: Steel, screwed
  • Bracelet: probably original with Junghans clasp and 6-pointed Junghans star
  • Price group: 088
  • Serial number: 088/4981

Remark

This model of Junghans Olympic series was awarded to 25-years of service of an employee of the RAG (Ruhrkohle AG). The Valjoux 7734 found its use also in the Olympic Bullhead Chronograph.