I just finished taking parts from 3 watches and modified them to make one really neat watch. I found a B.W. Raymond dial over a month ago. In doing research, I found out that the movement usually put in the railroad watches were the 730A movement. I found a person selling a 23 jewel watch and when I asked what the movement was, luckily it was a 730. Then it was a matter of finding a case to fit everything in. I found one on Ebay selling a 23 jewel gold filled case, but the 770 movement wasn't working, so I got it at a great price. It took a few hours to pull everthing apart and get it all back together. The end product is a B.R. Raymond gold filled wristwatch with a 730 movement. I am not certain of the difference between a 730A and a 730, but I am tickled pink. It runs great and keeps good time!