Sao Tome & Principe issued a set of stamps on ships in the form of sheetlets to mark 25th Anniversary of International Maritime Organisation & Universal Postal Congress at Hamburg. The Stamps were issued on 19 Jun 1984.
A Sheetlet containing eight stamps along with a label is listed. The ships featured are
Bank of Bhutan sent a Registered Cover from Phuntsholing Post Office (Bhutan)to Asansol (India). A 10 Nu stamp issued by Bhutan on 15 Mar 1980 has been used. The stamp was issued to commemorate 100th Death Anniversary of Sir Rowland Hill (1795-1879). It is difficult to find such used covers.