Chris, I use a blank quadrille page
at the back of my album for mounting
unusual items like this.
Certainly keep the item, they arouse great interest.
For a database I would catalogue using the same number
as the stamp and in brackets (cut square)
A dedicated Yugoslav catalogue of stationery
would list them I guess.
Here, a collection of mutilated canadian stationery pieces.
to show how it can look.
