▁of ▁the ▁Royal ▁Canadian ▁M int . ▁P rit ch ard - And rew s ▁Co ., ▁based ▁out ▁of ▁Ott awa , ▁struck ▁the ▁medal . ▁The ▁ob verse ▁die ▁featured ▁the ▁old ▁arms ▁from ▁the ▁City ▁of ▁Ott awa ▁and ▁had ▁been ▁previously ▁used ▁by ▁P rit ch ard - And rew s ▁for ▁various ▁comm emor ative ▁med als . ▁P rit ch ard - And rew s ▁retained ▁the ▁design ▁once ▁more ▁for ▁the ▁C NA ' s ▁medal . ▁The ▁reverse ▁die ▁has ▁been ▁lost ▁but ▁featured ▁the ▁word ing : ▁“ Can ad ian ▁Num ism atic ▁Association ▁– ▁Chapter ▁No . ▁ 1 ▁- ▁Ott awa ▁Host ▁to ▁Convention ▁– ▁Sept ▁ 7 ▁& ▁ 8 , ▁ 1 9 5 5 .” ▁Reg rett ably , ▁the ▁med als ▁were ▁struck ▁from ▁cl ashed ▁dies ▁and ▁a ▁crack ed ▁ob verse ▁die . ▁▁ 1 9 5 6 ▁C NA ▁Ann ual ▁Convention ▁ ▁The ▁third ▁C NA ▁Convention ▁was ▁held ▁in ▁London , ▁Ontario ▁on ▁September ▁ 2 1 ▁and ▁ 2 2 , ▁ 1 9 5 6 . ▁Bir ks ▁Jew ellers ▁designed ▁and ▁struck ▁the ▁official ▁convention ▁med als , ▁although ▁the ▁dies ▁were ▁destroyed ▁in ▁ 1 9 7 3 . ▁The ▁medal ▁was ▁of ▁oct ag onal ▁shape ▁and ▁featured ▁the ▁arms ▁of ▁the ▁city ▁of ▁London . ▁In ▁later ▁years , ▁the ▁ob verse ▁die ▁was ▁used ▁to ▁strike ▁bronze ▁med als ▁that ▁comm emor ated ▁the ▁