In the early and mid 1960's, Lawn-Boys were either gold, tan, or light green (depending on the specific year). What your aunt has is a typical classic Lawn-Boy with either a D-400 or a C-series OMC 2-cycle engine. If the deck and engine are in good condition, it'd probably sell for $100 to $250 on eBay.

Here is a 60's lawnboy that just sold on ebay. Does it look like that one?

Here is a link that might be useful: LawnBoy Mower

I do not believe any "D" LBs were painted Gold. That would be a "C"

Walt Conner

By 'rectangular head' I'm sure he has an old 'brick top' which would be a 'C' as Walt said. Whatever it is, it is a rare and collectible Lawn-Boy, and at the least would be fun to use once in awhile just for that distinctive scent - toasted grass on the under-deck muffler, fresh-cut grass and Lawn-Boy oil, all combining for a unique mowing experience, not to mention the 'burble' and 'power hum'. be careful with the mix, it might be 16:1. Whether 16:1 or 32:1, I would use Lawn-Boy oil in it.

Tooltime,
The gold and off white mowers (as lawn Boy called those colors) were offered between 1958 and 1961. As Walt & Sax said, they were all C motors. What is the model number. It's on the round disc on the back of the deck.

Thanks for the replies guys. It is a Model# 5200 18"

According to the parts viewer on Lawn-Boy's website, the model 5200 was offered for one year only (1958) and it had a C-series engine.

Given its one-year-only status, if your aunt's mower is in good condition (and you don't want to keep it), it definitely should sell for at least $200 on eBay.

Thanks again guys, I think I have her talked into selling some of the stuff she has in her barns as she is getting on in years and we have to clean this place up. I will link the Craig's List or Ebay site to this thread when we are ready.