325 x3, 323, 334, 335 [1951 55 øre Brown Frederik IX and other values of set: 25 Light Blue, 30 Brownish Red, 40 Gray] (VF) on a 25 May 1954 registered airmail business-size envelope to the U.S. The envelope is a little aged, but the stamps are all VF. The rate is correct for 20 grams: 60 for surface rate to 20 grams, 40 registry fee, 4 x 40 airmail surcharge. The net of the three rate components make this rate possible only from 1 July 1953 through 31 March 1957. This unassuming cover is an extremely scarce item! The 55 øre Brown is rare on cover: AFA 2007 lists it at DKK 1200 = US$210 for a typical usage. This usage is much more interesting, with three examples of the stamp and the franking is "pure" Frederik IX!
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