The EFO Collector
Buyers & Sellers of EFO Material
73. Other experiments: Many experiments have been conducted over the years that have resulted in the issuance of unusual stamps. Examples are Banknote double papers and other varieties aimed at reducing the removal of cancellations, blue and clay papers in the Washington Heads to control paper shrinkage, and Silkote paper on the 1954 2¢ Jefferson to improve the printed impression. All exist in limited quantities and have significant additional value.
Type 73: This cover shows a postal use of Scott 359 printed on blue, high rag content, experimental paper. The objective was to control shrinkage and reduce poor registration of perforations. The experiment was a failure.
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