Late serial 145.012s flat bottom is fine, earlier would be teardrop, that was the transition reference for the hand, any 145.022 should be flat bottom and any 105.012 should be teardrop bottom.
If I may make a suggestion, while you're hunting purchase the book "Moonwatch Only" as its simply a superb reference book that will both help you in your search and make you appreciate the watch itself even more when you finally secure it.
Click to expand...