1966(?) CONN Min-O-Matic Rhythm Drum Machine
Published on Aug 2, 2012 keyboard resource
"This little drum box has suction cup feet and was supposed to sit on top of a home organ. Not very complicated or useful but has some charm, I guess. Probably from the late 1960's based on 'Teen Beat' selection."
Update: found a video of one above. Note this is not the actual one for sale below.
via this auction
"Cool little rhythm unit. Could be made to fit into a 5u module. Perfect xmas gift!"
Only one other has been featured on the site. There was a video of a third, but it appears to have been pulled.