This is an event cover for the dirigible USS Macon. Made by the cachet maker Aiglon for Oaklnd/Alameda Chamber of Commerce. US Airship event cover are very common and can be easily obtained, but this one, listed in Mellone's airship catalog, was tied to a business reply envelope to Clyde Welch, himself a cachet maker. The reverse has another cachet for a USS Constitution stamp. The Mellone lists 700 were make, so this one is common. Does anyone have any history on why a business reply envelope was used? Apparently this was not the only time this was done. yakboomer
