Do you know what "PP" stands for?

Postage Paid Impression is the solution for bulk mailing of homogeneous local and international mail to be posted out regularly. There are only four basic designs to choose from as mandated by Singapore Post, and the four designs as shown in the picture below are Vanda Miss Joaquim, Traveler's Palm, Merlion and Changi Airport.

By the way, Vanda Miss Joaquim as seen in the impression above, was chosen as Singapore's national flower on 15 April 1981.