This is a Transjordan Stamp from 1920.  This is SG 6, the 2 Piastre Type 1A Overprint Green stamp!

This one is Mint and in Very Fine Condition!

It's worth noting that while the stamp itself is most likely genuine, the Overprint we are unsure of.  For this reason, this item is offered AS IS.  Please consider this carefully.  If it is real, it is valued at L850 in the Stanley Gibbons Catalogue.