Stanley Produced Unbranded Plane?
Stanley, along with other manufacturers, produced unbranded planes for resale through hardware distributers. The similarity of this plane to early Stanley’s makes me believe you have one of those. The twisted style lateral adjustment lever was used on the cheaper lines of Stanley produced planes and the shorter knob is typical to the older planes. The Stanley Sweet heart logo indicates that the original blade was replaced at some time. Since the plane is not a typical Stanley line it can’t be “typed” the same as heir regular line.
Unlike many collectors, I don’t worry about “type”, especially since many parts were shared across types as changes were made until old style parts simply ran out on the production line. Just appreciate the quality of the functional abilities of the tool and have fun with it.