That is an old Master Locker Lock set up with a beveled bolt perhaps used in a slam lock configuration...
Master used to offer keyed locker locks with lever tumblers as an option, either KD or with a master key option...
I don't have any Master Lock product catalogs or service manuals old enough to have any specs on those products but the modern equivalent of that lock is along the lines of a #1714 which comes with a 5-pin padlock cylinder installed available KD, KA or Master Keyed...