Interesting display for, as you mention, a common set. With that pedigree and signed certificate, I'm sure it went for at least a couple orders of magnitude higher price than a typical 1970 proof set.
Member of SPMC, FCCB, ANA and ANS.
My U.S. Classic Commemorative Complete Set: https://www.NGCcoin.com/registry/co...sets/278741/
My U.S. Fractional Note Set: https://notes.www.collectors-societ...eSetID=34188
My U.S. Classic Commemorative Complete Set: https://www.NGCcoin.com/registry/co...sets/278741/
My U.S. Fractional Note Set: https://notes.www.collectors-societ...eSetID=34188




















