Junghans 688.10; Valjoux 7734; Junghans olympic; Front
Junghans 688.10; Valjoux 7734; Junghans olympic; movement
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
Reference 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.