Another cover from Singapore, this one is from postcrosser Rachel L. for Nice Cover Circuit in postcrossing forum.
On the cover, Rachel affiixed four stamps that commemorate the 40th anniversary of ASEAN (Association of South East Asian Nations) which are jointly issued by Singapore Post and all other ASEAN countries in 2007. There is also one postage label. The commemorative stamps, from left to right, feature: National Museum of Singapore, Secretariat Building Brunei Darussalam, Vimanmek Mansion in Bangkok, and the Malayan Railway Headquarters Building in Kuala Lumpur. The postmark date is 20 June 2013. Thanks a lot Rachel!