Open the cab to see what speakers are in it and what wood the cab is made of. Celestion G12T-75 speakers and plywood cab is good. Off brand speakers and particle board cab is not good. Try the cab and make sure it works if you can.
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I take it the 1936 is just smaller than a 4x12 but the 1922 is smaller?
1922 is about 10-15% smaller than a 1936, yes!
Not a bad cab - not as much bottom end as a 1936, but smaller and lighter, and a good option where space is at a premuim, or as a 2nd Extension cab!
My early 80's JCM800 1936, ply cab, with one handle on top and loaded with G12-65's sounds pretty amazing hooked up to my 1987x.
I take it the 1936 is just smaller than a 4x12 but the 1922 is smaller?
1922 is open back I think. No?