1970 Shell Prime Ministers of Canada Commemorative Mediallions

This is a partial set of 13 of the original 15 commemorative medallions given away by Shell gas stations in the 1970s.  They originally came with a display piece and were a set of 15.  We have 13 of the coins available here but some are duplicates.  Please see pictures.  Found in an estate sale and condition is shown in the pictures.  Thanks for looking!