This were the 2 stamps planned but unable to release during year 1959 and 1960.
The first stamp (vertical format) was to commemorate the installation of the Yang Di-Pertuan Agong II (second king) of Sultan Selangor in 1 Sept 1960. Stamp designed in grey color as background, 10c and printed in UK. His Majesty passed away at Istana Tetamu in Kuala Lumpur on 1 Sept 1960, the day fixed for his installation. Therefore, the stamp was not release.
The second stamp (horizontal format) was planned to issue in 27 Nov 1959 to commemorate the 25th Anniversary of Accession of the sultan of Negri Sembilan. The country name was Malaya at that time and the stamp designed in red as background, printed in Holland. Denomination is 10c. This stamp was unable to issue due to His Majesty passed away.