16c Air Emblem - Dark Blue. (1923 Second Air Post Issue). First Day Cover - Washington, D. Extremely Fine, a well-centered stamp on an.Exceptionally fresh cover to Philip H. With 1978 Philatelic Foundation certificate #67461. If you have questions regarding this high-quality cover, please contact Christopher Rupp. Rupp Brothers was established in 1975 - our 48th year in business as professional philatelists.
Contact Christopher Rupp to sell your quality United States stamps & covers. Choice stamps and unusual covers are keenly sought for a sophisticated and broadly-interested philatelic clientele.
Christopher can be counted on to provide collectors with competent and trusted advice. Collectors deserve to receive the full market-value for their philatelic collections. Christopher Rupp will work, on your behalf, to achieve your philatelic and financial objectives.