Canada #589 (SG#696) 4c Black King 1972-1978 Caricature Issue LF Paper Type 9 UR Block On FDC SUP-98

$1.24
SKU 222802654109

A superb unaddressed official first day cover of the 4c black William Lyon Mackenzie King stamp from the 1973-1977 Caricature Issue, with an upper right plate 1 block of 4 affixed. Printed on smooth wove paper showing no ribbing. The paper gives a dull bluish white reaction under ultraviolet light, with a low density concentration of low fluorescent fibres,a sparse concentration of medium fluorescent fibres, and a very sparse concentration of brownish woodpulp fibres being visible in the paper. General OP-2 Ottawa tagging, 4 mm wide, of moderate strength (clearly visible to the naked eye, but not dark), and glowing a bright yellow under ultraviolet light. Comb perforated 12.0 x 12.5. Unitrade lists #589 as LF paper, but I have found at least 18 varieties of the fluorescence and tagging that most closely fit this classification. This is one of these variations. The envelope stock gives a non fluorescent brownish reaction under UV, with a very sparse concentration of medium fluorescent fibres being visible in the paper. The red lettering in the inscription also fluoresces slightly. Unitrade values a VF-75 cover at $0.80 for the basic LF paper as a pair, and does not value any of the paper varieties on FDC, nor does it price plate blocks on FDC. The cover offered here grades SUP-98 as follows: Intactness of the cover: 25/25  Paper freshness from the front: 25/25  Paper freshness from the back: 10/10 Condition of the paper and edges: 15/15  Appearance of the handwriting: 5/5 (unaddressed) Clarity of the postal markings: 15/15 Condition of the stamps: 3/5 Note: the above scan is a stock photo as are all my scans for material after 1952. The item(s) you will receive has (have) been carefully checked to adhere to the above grading standards, so while it (they) may not be exactly the same, it (they) will be of the same quality. Also, I do not provide back scans of NH stamps or blocks after 1952 unless they are required to illustrate some attribute of the paper or gum. 

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