I was looking through Facebook marketplace and came across this older aluminum deck mower, I don't think the person selling it knows much about it since they explicitly said they don't know the year in the title. It's got the off-set wheel like a Lawnboy but the ridge pattern in the deck doesn't look like any Lawnboy I've seen, I'm guessing it's from the early 80s because of the warning sticker and the flywheel brake and the air filter housing looks to be plastic and not stamped steel, but the T-handle seems a little anachronistic for a mower from the 80s so maybe it's an older deck that was repowered and had some other pieces replaced/added.