My transitional 6542/1675 fantasy build
Took off the crown guards, aged the polished the case (a week in my pocket with change and house keys)
Added a 6mm crown (from Raffles, didn't need to change the tube) chamfered the inner side that meets to case
Reduced the underside of the bezel to clear the crown (increased the angle)
Added a shim washer under the bezel to tighten it up to gen spec action
Aged the bezel - too much for me actually
Aged the dial and hands, and added a small pointer GMT hand
Champagne date overlay
Dome crystal no Cyclop
Watertight in a basin but not pressure tested
Alas I'm not keeping this one as it's built for my brother-in-law...