Ludwig had sharp bearing edges? I've never seen one, actually, Ludwig and Slingerland were made pretty similar. Now Rogers and Camco had the sharper bearing edges and you saw a lot of jazz drummers using Rogers. We all know what propelled Ludwig to the top....Ringo.
Well all of the older ludwigs (maybe later 60s to 70s era?? ) had a 45 degree bearing edge at least on the inside of the edge.. (my old wfl 50's snare has more of a roundover i think)
My point was, slingerland seemed to stick with that roundover up through the mid 70's and I THINK ludwig had already advanced onto a different bearing edge to POSSIBLY cater to the louder, rock crowd ??
someone please school me on this if im wrong