Hello~ I recently inherited my late grandmother's Hall Craft Corp. Anniversary clock (stamped with REX on back plate), but I have absolutely no idea how it works. I posted a pic to show what it looks like if it helps. I did find taped to the bottom of the clock a tiny brass square piece which has a pin through it, so I'm assuming it's of some importance, just not sure what... if someone here can help me get this beauty working again, I'd sure appreciate it Thanks much!!