Simplicity Sovereign lawn mower in Poughkeepsie, New York

Purchased Mid 70s. Not sure of any specifics, I'm sorry. This tractor most likely needs work, a tune up, etc. Comes with a snow plow. Issues that I am aware of: back-firing, some smoke....I believe my Dad may have put the wrong kind of gas in it as prior to his death he was getting confused. I'm upfront honest & don't want you to have any surprises if you are considering bidding on this. Otherwise it was running good+.
PLEASE NOTE: This photo is NOT the actual tractor but looks like this, add wear & tear for 30 years.