1st A W W Co Coin Pat Apr 22.79 - June 9,85 - Aug 18.85 - have not seen with this type metal insert in case back & has 2 screw ring in case
2nd. Pat Apl'd For Am Watch Co Waltham Mass silver case
Don't remember sharing these before or seeing them here before
This is an 18s display case with a locator pin hole - that screws on & off with about 1 quarter turn!
I assume it's earlier do to locator pin hole - only one I've seen - anyone know who made it or used these for shipping movts ?