What tool/s do professional watchmakers use to force retainer rings over 5513 crystals?

[Nanuq]

Great idea Ronin, have you had any cracks?

[Ronin]

Thinking back, no, never cracked a crystal.   I tend to stick with, Gen, Clark, Sternkruz...

[capice]

thanks for sharing, great tip

[RickFlorida]

Update.  I just discovered that there are “bezel fitting tools” and not just “crystal fitting tools”.   So obviously, the subs and sea dwellers use bezel press tools which use deeper dies.   I just had zero clue they existed until now.