[quote=&quot;hhicklin&quot;:13rwcsea]Thanks for that information.  Does anyone have any other information on a 1930 Hart Parr 18-36 serial number 89341?  Anything is appreciated.  If Hart Parr became Oliver in 1929, how were there still 1930 Hart Parr's?  Is this Hart Parr serial number 89341 a model H or I?

Thanks.[/quote:13rwcsea]

Even though the merger took place in '29 it took a good year for things to get in place and get rid of the existing stock of tractors. I understand that some new HP tractors were still being sold in the early 30's, the company discounted the price just to move them. Of course the new Oliver Hart Parr tractors that came out in 1930 had the Hart-Parr name very prominent cast into the top radiator tank. 

Your 18-36 is still the same as the earlier ones for the most part, except for the 1926 and 1927 models that were 2 forward speeds.