Lot of 3x 1971, 1972 & 1973 Canada Specimen Double Dollar Sets, 3Pcs (Impaired)

Lot of 3x 1971, 1972 & 1973 Canada Specimen Double Dollar Sets, 3Pcs (Impaired). Sets have various issues, like corrosion, spotted/damaged flocking, missing clasp, toning etc. Usually doesn't include CoAs. Image is an example of the sets.  Please note that the 1973 Set contains the 50% by weight silver dollar.