Curiously, this 1986 model (serial #L85F080646 = December 1985) has a red Adjust-O-Rite plate instead of a light blue one.
~Ben
http://www.ebay.com/itm/Vintage-Roy...ultDomain_0&hash=item4aaf59fd37#ht_500wt_1361
~Ben
http://www.ebay.com/itm/Vintage-Roy...ultDomain_0&hash=item4aaf59fd37#ht_500wt_1361
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