Bad news for 6497 owners.... Rob's reply:
I can probably get the crown to fit the case, but I can't get the stem to work...basically you can't get a 6497 stem in any size other than 1.20mm, and the crown is 0.90mm...if I use the stem adapter, the crown is sitting out from the case by about 3mm and there is no way I can get it closer to the case. Problem is with these models, there is no case ring, the movement sits right up against the case sides...so no room for any stem adapters.
I don't have any tooling to be able to make a 1.20mm stem into a 0.90mm one...
Sorry