Girard-Perregaux “Elcron”

Swiss Watch Fair 1968 BF 45
New, very small electronic quartz timekeeper. The movement’s volume (without case) is only 155 crn3. Precision to 2/1 00th second per day. It can be used as a master clock (i Hz impulses). Seconds hand re-set by buttons. Two years battery life. (GIRARD-PERREGAUX “Elcron”)