Question On Unlisted Italia After Syracusean Coin, Stamp

I have a 1953 Italy, ITALIA AFTER SYRACUSEAN COIN, Stamp.
That is not listed in the Scotts Book, It is a Violet 15 Lire,

The Catalog does not list a stamp of the 15 Lire denom,

Is this a part of another release of the same stamp?

Thank you,

Check under 1956 stamps from Italy

Issued 3 May 1956, 15 lire violet-grey with watermark of stars.

Maybe when I bought the 2009 Scotts set. I should have bought a different set as there not listed under 1956,

Cn someone suggest another source to do my looking.

mo, it would be good for you to check the watermark of this stamp. Some were produced as experimental coils.

https://www.stampboards.com/viewtop...f=10&t=39201

EDIT: I know, it doesn't look like a coil stamp.

the stamp has perforations on all 4 sides,
but.

By the looks of it, The stamp has blue Stars
on the back like the one in that post.
you cant see a lot of it due to the paper stuck on the back,
But you can see what looks like a part of a star.

It's basically impossible to see the perfs due to the stamps being on a piece. While I don't have in-depth knowledge of the coil(s) from this particular issue, it's important to note that some coils have been produced from full sheets of stamps. The coil stamps created in this manner will usually have perfs on all sides, however the perfs may be "clipped" on either the top or bottom of the stamp.

These stamps are incredibly common and are essentially worth nothing. The likelihood of its being a scarce variety is very low!

Ok, thanks for the info,