Hi, I'm looking to do a conversion on my Speedy from the regular metal caseback to the sapphire caseback found on various models, such as 3572.50 & 3573.50. I understand the parts I need are 112ST1589 (caseback with sapphire and gasket) and 079LC086108 (spacer), shown below. If you have a set for sale, please PM me.



Thanks,

Francisco

 

I recommend contacting Archer by PM. He can help you get the parts needed and even install them if you like.

 

very difficoult??