I am posting this project here as it will be a Franken Breitling but intended for my own use only and not for sale. I have been thinking about doing this project for at least 10 years - installing an R7734 movement in this case - just purchased on ebay. I have seen this done before but usually the date wheel is incorrect. So, to make it look right, I have an R7734 date wheel from a bullhead case that I have had for several years.
I would love to have one with an R7740 movement but finding one is not likely and if I did, it would cost too much. I sold my copy with the cal 12 movement about 7 years ago - should not have done that! I will post some pics when its done.