the franklin mint special commemorative issuses of 1973 first edition proofs

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i have a complete collection of special commemorative issues of 1973 first editio proofs in book, i believe there are 36 coins total, the specimens in this album are first edition proofs of the medals which were selected and issued to subscribers of the 1973 special commemoritive issue program. i was just wondering if anyone out there can give me an idea of what they are worth thanks