These could be obtained by mailing in the little tokens at the bottom of the big sheets.
The number at the bottom could be used to participate in a lottery for Pokémon prizes.
This kit with a magnifying glass, tweezers and glue could be obtained from Shogakukan when sending in the little tokens at the bottom of big stamp sheets.
They are supposed to help with the process of pasting stamps inside of the stock books.
This poster depicts a large mew stamp that was never released in stamp size.
illustration by Mitsuhiro Arita
The back shows stamps of all 151 gen 1 pokemon.
This poster was released in the February '98 issue of the Elementary school magazine