Here's a combined photo of a 50 Pence Postal Order that was issued in 2005 at B.F.P.O. 567 in Nicosia,which was designated an official United Nations Field Post Office.
This British Field Post Office has since closed.
B.F.P.O.-issued postal orders issued within a British Commonwealth country are classed as being a numismatic item of that country.
B.F.P.O.-issued postal orders are regarded as being extremely scarce or rare,due to their sale being restricted to British Armed Forces personnel & authorised civilian employees only.