Random question, but does anyone know which size screwdriver is needed to remove links on the Speedy 3313 co-axial's bracelet (1957 or 1958). Thanks in advance.

 

1.6-1.8mm.

 

Thank you! Meaning either size will work?

 

Yep. If you hollow-ground your screwdrivers 1.6mm works but if not 1.8 will do.