La Marque 17 Jewels Watch Unbreakable Mainspring Incabloc Antimagnetic. Watch was bought as part of an estate sale lot. All watch pieces appear to be in tact as I was able to find and have the watch tick on time for about an hour. Once it stopped ticking, a few taps on the crystal restarted the watch. This tapping trick worked for another 20 minutes and now the watch will no longer tick. Hands still move freely but I am no longer trying to confirm it will hold time. Watch absolutely needs to be serviced but all pieces should be good so watch does not need to be a parts watch