Having come into one of these hubs I did a search in the archives but couldn't see anything conclusive. Was the consensus that these hubs were just early Tipo? This particular one is dated 1970. Perhaps the switch to round holes was a cost saving measure and helped to visually differentiate the Record and Tipo hubs.
Thoughts? Conclusions that I missed? Anything?
Thanks,
David Bilenkey
Ottawa, Ontario, Canada