Australia #554/579 1973-1981 Definitive Issue, A Specialized Fine and VF Used Lot of 65 Stamps
A fine and VF used group of 65 stamps, covering most all the values of the 1973-1981 definitive set, with multiple paper varieties of many values. The only missing stamps are #563, 569, 571 and 577.
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.
The inks on some values like the 1c and 3c show considerable variation under UV light as you can see from the attached pictures. The paper fluorescence also varies from medium fluorescent to hibrite. Again, you can see these differences from the picture showing the back of some mint gemstone stamps under UV light.
Scott lists the basic stamps at $26 for VF used. The stamps here grade between 70 and 84, with most being 75 or better. This is an excellent start to a more specialized collection of this issue.