Yes, I was a member of the International Philippine Philatelic Society.
The IPPS used to have a membership card and my number was 261, which remained the same for a number of years hence.
Cofounders of the society in 1974 were Linda and Frank Stanfield (1916-1979).
IPPS can only be described in superlatives. Its publications are scholarly and cover all aspects of Philippine philately. Its auction sales offer the most diverse Philippine material. Its members are the best in their fields of interest, garnering the highest awards at philatelic exhibitions.
A lot more can be found on the IPPS website: