The back of the Lawn Boy one says "OMC Group" on the back. That's the company that made Evinrude and Johnson boat motors. I had no idea that they owned Lawn Boy, so I looked it up.
Apparently OMC sold Lawn Boy to Toro in 1989, so that means this oil has to be from the 80's or earlier.
If you have an old 2 stroke and want to use it, it'd probably work just fine. Otherwise, if you have no use and/or you're scared of it, drain and recycle the oil and then keep the cans.