Subsequent to my blog regarding the 1970 Sarawak Exhibition, George Wu, blogger from Gulfmann Stamp Collection have provided me with his certificate of membership for the Sarawak Philatelic Society. The Society postal address was:
PO Box no. 376, Sibu, Sarawak.
I have uploaded the Certificate of Membership to share with fellow collector:
However, we still have no information as if the society is still active or such. Anybody who have more information is more than welcome to share it here under "comments".
Once again, thank George Wu for the information.