I don't know who made it for Sears but my 1st couple were Sears with that funky "loop" handle, 5HP/24" Tecumseh, windup starter, 1st one was red (My Dad had one when I was about 3 that I used to sit on his lap while he mowed) I got my 1st at 12, for $5 and the guy wanted a note from my parents, saying it was OK for me to have; Dad wound up going over with me in one of ol' Fury wagons he had, to go pick it up. I rode that thing all over mowing everyone else's yard with it. I took that engine apart (not my 1st) as my "guineaq pig" in Freshman small engine class and sandblasted/painted the rest of the mower in anticipation of putting that fresh rebuilt engine on there; it never ran again. I went back to that engine off and on for all my HS days and had it apart probably 50X and never did get that one to run again.
Yet I had others in betweenm that I'd also done full rebuilds on, that turned out great.
Shortly later I was given a gray version of the same mower with an off white fiberglass cover over the engine. (still a 24" cut but this was a "6 HP"; I still have the engine off that one up at Mom's, I saved it, since it still ran well once the magnesium deck was long ago too busted up for its own good. I still have a couple of those dual feed Tecumseh gas tank/shrouds; probably left over from my later Swishers.
