The Brunei Sultan Omar Ali Saifuddien Mosque in Bandar Seri Begawan will be celebrating its golden jubilee this year. It will officially be 50 years old on 24th September 2008. It was officially open 50 years ago on that date. The mosque is currently undergoing restoration and a lot of tourists are unfortunately unable to take a good photograph of it. The mosque is actually based on Moghul architecture and hence the similarity of the design of the dome with that of the Taj Mahal in India.
Anyway, I have managed to acquire very recently a first day cover issue on that day. It was sent by a Mr YF Chin of the Telecommuncations Department in Brunei to a Mr Fong Pang Loi, presumably his friend at Posts and Telegraph of North Borneo in Jesselton (today's Kota Kinabalu). The first day cover will soon be 50 years old too.