Members here may well have copies of this so far unique stamp - simply as no-one has ever looked for it before.
It is understood the ink used was a rare batch from Belfast Ireland, from that was supplied under the WW1 ink supply Emergency, that was entirely responsible for the vast range of 1d red KGV head shades.
Printing ink was normally supplied from Germany via agents, and many very strange variants were used as stop-gaps during the War when that supply source ceased.
This stamp in daylight looks identical to the normal variety, but oddly, reacts vastly differently under bright moonlight conditions, and the Yellow Quartz Lamp.
The only simple way so far found to distinguish the new discovery from the more usual versions, is to hold it at an approx 45-degree angle to reflected full moonlight, in an outdoor setting.
This stamp was only discovered during the recent "Super Moon" phenomena of March 19, where the ink-mix glowed on the reverse with a distinct Emerald Green tinge to the discoverer.
This phenomena is not observable in direct sunlight, or under the usual artificial fluorescent or Ultra Violet light devices yet tried.
The specialist Yellow Quartz Lamps do show it clearly, but they cost $100s and are not often owned by collectors.
The discovery stamp has an undated Melbourne circular date stamp, and is perforated "OS" for official use, and is sadly, rather badly centred.
It has red ink "Compartment Lines" on at least 3 sides, which, may assist in dating it.
The moon was at the closest approach to Earth, which made the moon appear 14% larger than usual.
The collector had 100's of used stamps spread on his desk to sort, and one glowed a curious green in the direct moonlight.
The stamp was bought from a Country Women's Association fund-raiser fair at the small dairy town of Poll, New South Wales, in a bulk lot of pre-war stamps.
It is thought to be from a tiny printing produced with the wrong ink. The sole example known so far, is perforated "OS" for official use.
The remaining stamps from the original sheets may have been destroyed, or might still reside in collections - possibly even including those of Stampboards members.
Members are encouraged to check the reverse side of all your 1d red perfin "OS" stamps outside, during the hours of moonlight, or using a Yellow Quartz Lamp.
The house lights are best turned off, to see if you have an example of the rare "Poll Fair OS" 1d shade.
Stamps need to be held at approx 45 degrees in strong moonlight, and are best viewed from the reverse. The error ink has a pale but distinct "Emerald Green" hue.
Emergency batches of red inks were widely used during this WW1 period of issue of the 1d Red KGV head, and 100s of diverse catalogue shades are recognised.
Print inks traditionally came from Germany in this era, and being at War created havoc for stamp printers. "Make-do" supplies needed to be sourced wherever procurable, and anything remotely red in colour was purchased by the Government.
The popular "Lemon Yellow" 4d KGV stemmed from the same source issues with orange ink, and the very recently catalogued sub shade "Lime Yellow" (ACSC 100d, Cat $500) took 90 years to be recognised and accepted.
Most commonly known as "Paris Green" this aniline compound was used as a fade free paint by many leading artists including Van Gogh, Cezanne and Monet.
Until this new discovery the most expensive 1d red shade is the Salmon Eosin Pink group. Over 1000 copies are recorded, yet they still get quite mad prices at Auctions.
The only way to verify the expensive Salmon Eosin shades is similar to the "Moonlight Green" discovery - special lighting is needed.
The Phoenix Auction of February 25th, 2011 had a nice looking Pink Eosin example, also perforated "OS" with an estimate $2,400. After frantic bidding this copy - lot 1194 - was invoiced for $A8,155.
Many dozens of them were found in the "Salzburg Tea Chest" hoard of unchecked 1d reds only a few years back, by stampboards member "Koala", also with all kinds of un-recorded KGV head major rarities - https://www.glenstephens.com/snjanuary11.html
The "Poll Fair OS" 1d Red discovery was mailed to Glen Stephens for verification, and he is shown holding it outside one evening, and verifies the strange Emerald colour reaction.
"Really Lights up like a green volcano when moonlight falls on the reverse"
It was offered to KGV specialist Arthur Gray for direct purchase for $100,000, but he declined.
It has been submitted to the Royal Philatelic Society Victoria for a certificate I understand, and will apparently be listed in the next ACSC for a reported $100,000 - this example so far being unique.
The stamp is scheduled to be on the front cover of the next "Stamp News".
Other scarce Australian items such as the used 5/- Kangaroo sideways watermark (in poor condition) sold for $A118,000 at the Arthur Gray sale, and other Kangaroo pieces have obtained far higher prices than that.
The Tete-Beche 2d red pair is listed in the ACSC at $250,000 - and that price is 5 years old.
The owner has suggested the new error be referred to as the "Moonlight Green" shade 1d Red.
Hugh Jefferies the editor of the Stanley Gibbons catalogue has also been advised, with a view to adding the listing.
It was requested the stamp be made available to take to the stampboard meeting at 'EXPO 2011' at the Sydney Showgrounds on April 2 at 11am. Suitable insurance cover is hopefully being organised, to achieve that end.
There may well be more copies to be discovered by eagle eyed members. Please report all finds of "Moonlight Green" shade 1d Reds to me, and I'll note them for the record.