I have an Oliver, Hart-Parr 70.
If the number on the plate on the engine block is the serial #,  
I can't match it up on the list I was viewing?
Number is : 201952

I used to know a lot of this but sold off my collection 10 yrs. ago when I married .  After crying my self to sleep every night, LOL,
I've re-entered the Hobby.

Jeff in WY