I attended and really enjoyed my first HPOAC meet in Cedar Falls a few weeks ago, but I came away with more questions regarding a 550 that I have.  It&#039;s serial # is 121433 (perhaps a mid-year 1962).  The tractor has a later model hood (no side indentations for the Oliver logo) and a fiberglass checkerboard grill.  Mr. Larry Gay&#039;s book &amp;quot;A Guide to Hart-Parr, Olliver .....&amp;quot; p 42 states &amp;quot;For the 1963 model year the 550 changed to a checkerboard style of grill&amp;quot;.  Do any of you know when Oliver would introduce a &amp;quot;Model Year&amp;quot;?  Is there any way to tell just what hood and grill this 550 should have?
Thanks,
Barry-KC