Pie Traynor, copy of sketch, w/ press stamp

[billyb]

First let me apologize for the sample watermark on photo, was way I received this copy. Photo is actually clean.
This is believed to be a copy of a newspaper artist's work. The copy is printed right on this 14 x 9 heavy duty cardboard stock. and has press stamp on back stating "reference dept. 6 Oct 1927 Press" We tried 3 different copy machines but stamp would not come out, but is easily read with naked eye.
So if this was used by media, why preserved on such a large stock??
I am guessing that it was made from the original drawing and used as a sort of die to make other copies, what do you think'
We put a small yellow mark on back indicating where press stamp is located,zoom and you can faintly see outline.Attachment 90922

Attachment 90923