Maxmatic Batch-Feed waste disposer Magnitop plug to make the unit work.
This Magnitop plug also fits, Acorn, Burco, Banquet Cuisine, Econa, Franke, Fobe, Parkamatic, Bestobell, Bell Home Appliances etc disposers. The Magnitop plug will fit other badged Batch-Feed disposer models only. Magnitop plug that makes it work and seals water into the sink.
Same design plug since 1947, only this type available.
If the old plug works, but this one doesn't, you have a problem with the sink outlet alignment which requires adjusting. See disposer fitting instructions.