Bag
Cover? The bag is bojack but the bag toppers either 562 or sanitronic 7 had open top bags. The closed too bags from I think sanitronic 7 1963 to the last heritage 2 legend 2 had closed too with a rubber bag cover that is a topper with a hanger. Then there is heritage toppers. The open top hangers are like royals except the cloth folds that.
It's a homemade bag but the topper is correct pre 1963 kirbys.