Boyd's City Express, New York N.Y., Mercury Series, Cover Collection (20L47/20L56). Seven covers franked with Boyd's Mercury Series stamps between Scott Nos. 20L47 and 20L56, each mounted on an exhibit page with detailed description and write-up, most are corner card covers and one is an overall illustrated cover for the Evening Post, some of the typical flaws to be expected but a number of four-margin stamps are included, overall Fine-Very Fine or appear so, two P.F. certificates accompany, see our website PDF for a full scan

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