The "Erivan" Collection of Western Postal History

Type 1 datestamp on 2c Red entire to New London, Missouri, uprated with 10c Brown for registry service, two-line red "Big Bug. A.T. Redister'd #" Type 1A handstamp and manuscript "2", just reduced at right into indicia, otherwise very fine, the unique example of this territorial registry marking, one of the greatest rarities of Arizona postal history