Australia #493-507 1971 Commemoratives, A Specialized Lot of 15 VFNH Stamps

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A specialized group of 15 very fine NH, covering all of the 1971 commemoratives, except for the Christmas issue, plus an extra paper variety of the Sydney Stock Market issue. 

The Australian equivalent of tagging is called Helecon, which is a chemical in the zinc sulphide group that fluoresces orange-red under long-wave UV light. The very first stamp to be issued with Helecon coating applied to the paper was the 11d Rabbit Bandicoot from the 1958-1964 definitive issue. Later, the 5d orange-red Queen Elizabeth II stamp from the 1963-1966 issue was issued with the Helecon incorporated into the ink. By the end of 1965 all stamps issued had Helecon applied to the paper. On this issue, some stamps are found with a uniform coating on the paper that glows orange-red, while others have the paper impregnated with Helecon, so that it appears greyish white from a distance under UV, but under magnification, tiny orange-red dots can be seen on the surface of the paper. Most of the chalk-surfaced paper stamps from these issues are like this, while the engraved stamps (of which there are none in this lot) tend to show a Helecon coating on the paper. 

Scott lists the basic stamps at $10.65 for VFNH. The stamps here grade between 75 and 84, with most being 80 or better.