Part of an SOS kit I found yesterday. Never had a battery in it so first priority!
Ticking away perfectly. Unusual quartz movement. Swiss ETA. Advances every 5 seconds (can hear the tick).
Claimed to be water-resistant (has an o-ring on the snap battery cover), but I won’t risk it. I can always pop out the movement if I need to flush/clean the SAK.
More pics to follow as I also got an older SOS kit with an original SwissChamp...so look out for some comparisons!