This lot, " Vintage Replacement Pieces Parts for 1975 Risk Board Game Parker Brothers", would be a complete game except 2 cards are missing (don't know which ones) and the 2 white dice are missing.  The army pieces are there but I haven't counted them so some may be missing.  The board is in good shape and the rule book is there. The box is split at the corners and a bit more and shows the wear of 48 years.

This could be just what you need to fix up your old game if it is missing parts.