[Pharmlou]

Old thread, but trying to make my 67 5513 as waterproof as possible also with the original twinlock crown that it came with. I have managed to find a 24/7000 case tube that does not have splines. It does not have a case to case tube washer or gasket like the latter ones and I understand that they did not originally come with one BUT, seeing as when Rolex changed them over to triple lock crowns they would have ended up using said washer anyway, what is to stop us from using the washer from the newer casetube with the old casetube. Sounds like I am rambling....