=?iso-2022-jp?q?Hachiroku_=1B$B%O%A%m%=2F=1B=28B?= wrote in news:pdBki.6331$t05.3048@trndny09:
Aw, you've got the old-fashioned "integral bearing" type drum. Falling-off-a-log easy. Dates from about 1920. Maybe earlier.
If this piece won't come apart, then the shoes are worn into the drums, or there is a majorly big rust ridge.
You say you can't see the circular ends of the shoe hold-down pins? Those are ALWAYS visible from the back of the backing plate. A bit of Dremel work and Bob's your uncle.