Is this international postal order regarded as stamps or exonumia?

I have four of these international postal orders:

It says on the back these are exchangeable for stamps, or to pay for the postage of a standard letter internationally.

Do we regard these the same as stamps (not for our catalogue?)

odd job

I have four of these international postal orders:

 

 

 

It says on the back these are exchangeable for stamps, or to pay for the postage of a standard letter internationally.

Do we regard these the same as stamps (not for our catalogue?)

This is an International Reply Coupon - not a postal order.

Aidan.

Ah, same as stamps then. Thanks