been restoring a 4.5in HOW shell and deciding whether to mark on its cal. and filling etc so looked at various photos I have and ones on line and noticed some shells have the lettering stencilled on ie with breaks in the letter where the stencil supports the inner shape and some are continuous as the letters are rolled on. It does not seem to be age related is it just the manufacturers preference? I can try either method but would like to get it correct.