UNITED STATES of AMERICA. 6c Bald Eagle – Dark Blue & Carmine. (1938 Air Post Issue). Center line block of 4. With generous margins and vibrant colors. There are no faults. 2019 PSE certificate #1369661 (graded 95, nh). If you have questions regarding this exceptional 6c Eagle center line block, please contact Christopher Rupp. Upp Brothers was established in 1975 – our 48th year in business as professional philatelists. Contact Christopher Rupp to sell your superb United States stamps. Well-centered stamps, especially those graded 98, 98J and 100 are sought for a sophisticated and extremely discerning philatelic clientele. Christopher can be counted on to provide collectors with trusted and competent advice. Collectors deserve to receive the full market-value for their philatelic collection. Christopher Rupp will work, on your behalf, to achieve your philatelic and financial objectives.