Certina DS-2 Certronic

What I know is wrong with it

Not running. A new 344 battery is fitted and the tuning fork hums, but the hands do not move, so the fault is mechanical (index wheel or dried oil), not electronic. The crown is stiff, consistent with dried oil. Case in used condition with a few minor marks that can be polished out. Scratched flat mineral crystal that needs replacing. Dial in very fine condition: silver centre fading to dark brown. Original metal bracelet included, but the end links to the case are missing.

No watch here has been pressure-tested. A period WATERPROOF or WATER RESISTANT stamp says nothing about the seals today, so treat every watch on this site as not water resistant.