Singapore 2014 stamp booklet Bird adhesive TYPE I (2 advertising lines)
This booklet was deposited into each HDB public housing mail box, as a small token of compensation for the postage rate increase in 2014. There are 2 types. This is Type II with 2 lines of advertisements at the back. It is common that these booklets have very mild creases because they were deposited into mailbox and most people did not take good care of them.
Both booklet types are rare because most of them were discarded and destroyed.