You don't often find our beloved Sultan's image or even Brunei's images on other countries' stamps. The ones that I have come across so far are 4 - the image of our Sultan on a Korean stamp to commemorate Brunei-Korea relationship, the image of the dome of SOAS Mosque on a Japanese stamp to commemorate the ASEAN-Japan relationship, the image of the State Secretariat building on the other 9 ASEAN countries' stamps to commemorate 40th anniversary of ASEAN and the image of the Brunei flag on a UN stamp.
This Philippines stamp is the latest of all the world's stamps which has an image of His Majesty. This 7 peso stamp is a special issue to mark the agricultural cooperation forged between the Philippines and Brunei. Featured are portraits of Philippine President Macapagal Arroyo and His Majesty Sultan Haji Hassanal Bolkiah. The issue is offered as a block of 4. Get it while you can. It will cost more than the 7 peso in the future.