I recently acquired a 2004 $50 Jenkins-Dodge, AHJ changeover with a 2-digit mismatched serial number error (BC-65a-E15-ii). The note grades Unc.
AHJ 0273992 (on left) and AHJ 0272292 (on right)
{http://www.davgro.com/images/cpmf/2004_$50_AHJ0273992-2292_Back.jpg}
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Arthur Richards
Contributor, Charlton Catalogue of Canadian Government Paper Money, 19th, 20th, 21st, 22nd and 29th Edition
Pricing Panel Member, Charlton Catalogue of Canadian Government Paper Money, 21st Edition 2009