United States 1929 Aviator Clarence Chamberlin Signed Cherrry Grove Cachet Cover. Cover franked with 2c Washington, tied by Cherry Grove datestamp (Jul 4), signed “Clarence Chamberlin” in ink above Patchogue to Cherry Grove / Long Island / Auspices Suffolk Flyers cachet, no backstamps, an attractive cover. Member of the Canadian Stamp Dealers Association & Philatelic […]