Raimey,
German 9,3x72Rs were often proofed with a crown E to indicate Express proof I don't see why Belgian ones wouldn't also be so proofed. I'm guessing other 9.3s, certainly 9.3x57Rs (360-2 1/4 Flanged), would be express proofed.
Mike

Last edited by Der Ami; 03/11/26 11:15 AM.