Help Identifying This Stamp.

I see the perforated version but cannot find this stamp.

It's from a booklet. 1,155,200 booklets were issued.

This has been trimmed down from the listed stamp

Exists : Imperf in Green.

My mistake, it isn't from a booklet.

I am certain this is not a booklet stamp, as those were perforated. As far as being trimmed, seems like the space on the top and bottom is pretty significant (especially the bottom). I will measure the stamp when I get a chance, but assuming it's top to bottom measurement makes trimming impossible I would be at a loss to explain this?

hac5x3, then you already know the correct overall size. And what is that? I'd agree that it's larger than average, but if you have enough examples to measure, you will find the measurements will vary somewhat. Perforation technology was not perfected in 1927 and stamps can vary in size.

In case anyone is wondering if this could be half of SG#105a, half of a vertical "imperforate-between" pair, the full 105a examples I've seen are imperf between but perfed along the top of the top stamp and along the bottom of the bottom stamp.

The imperf in green is cut from a souvenir produced in 1988 for the Australian Philatelic Federation. Does that sound right? There may be others, too.

The booklet stamps were perforated all round.

hy-brasil is correct, the OP's stamp has been trimmed down so as to appear imperf horizontally.

Here is an example with the perfs cut off. No other photo trickery. I didn't make an exhaustive hunt for a jumbo example, I just picked one off of the first page of hipstamp.

Anyone knows more about these 2 stamps?
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Officially Sealed OX39

Riley Sc# 868 1940
(Pegasus : Award for Poetry)


Correction.
Icon for Literature and Poetry
wiki
Dating back to the ancient Greek poets and artists, and sustained through later European art and literature, the winged horse Pegasus is linked with heroic deeds and with poetry and creativity through his association with the Muses. The reception of Pegasus since antiquity divides into two main strands: his role in the Perseus and Bellerophon myths, connecting the winged horse with heroic deeds and battles with monsters; and an allegorical-symbolical interpretation, based on Pegasus' association with the fountain of the Muses.

Thank you, Sir

Rod222 - Did OX-39 have regular perfs as well as rouletted perfs? I am away from my stamp reference library right now.....and internet search showed OX-39s with only roulette perfs in the bing picture search....

I'm gonna check with stamp smarter...

OK, Rod222, sorry NOT roulette but Hyphen hole.....Stamp smarter says OX-39 has Hyphen hole 9 and Imperf....so I think Philatelycanada has something different....

Right, apologies Rick,
I just went on an ID, given to my copy, years ago.

So I'll dig out Scott specialised and check for you. (2004)

Yikes! . You were right, not even close!
I make it a Scott POS 6 design.
You will need to offer perf guaging, there is a vast variety
I am not a specialist

OX21 to OX37

If thin white crisp paper OX21 - OX27


This is my OX39
def. creamy paper.