Clint..likewise, Welcome...
Your Serial number:
205 = IH Kind # for a Garden Tractor
0660= IH Factory Code for a Model 1450
U = Manufactured at the US plant (IH had plants 'round the world) in Louisville KY.
621050 = one-up serial number ( manufactured in late Dec 1977)
All Manuals for the Tractor will reference the 1450 Model number and not the IH Kind/Code numbers found on your data plate. Operators, Service and Parts Manuals are available from
www.binderbooks.com. The IH CPE-2 Parts Manual for Cub Cadet Equipment (mower decks, tillers, etc.), is also available there, and is highly recommended if you have any of those optional items of equipment.
Myron B