Tom:

You will need to contact the Floyd County Museum.
Here is their contact info:

Floyd County Museum
500 Gilbert St.
Charles City, IA  50616

641-228-1099 (M-F, 9am - 4pm)
email:   <!-- e --><a href="mailto:fchs@fiai.net">fchs@fiai.net</a><!-- e -->

<!-- m --><a class="postlink" href="hiip://www.floydcountymuseum.org">hiip://www.floydcountymuseum.org</a><!-- m -->

<!-- m --><a class="postlink" href="http://www.olivertractormanuals.org">http://www.olivertractormanuals.org</a><!-- m -->

They will need your model &amp; serial number.

--Marc--