You take a 125.003 case from your junk box, rummage around to find the caliber 269 to "restore" the watch.
You can't find a cal 269, but here's a cal 613! OK close enough!
Bung them together, nearly there, just need a dial. Back to the junk box.
Oooo....look, perfect size, it's an hour/minute only dial from an antique ladies pocket watch, now where are all of those antique hands?
<later>
Perfect! I'll stick this on eBay, those idiots will let me sell anything.