Hello, These stamps are classiefed as distributor stamps see the link https://eshop.bpost.be/fr/personal/belgique I have a lack on my online Yvert catalogue for the period of 2012 to 2016 for such stamps hope this help Abderrahmane
Can these be used for mailing a letter? Doug
"Can these be used for mailing a letter?"
Thank you for the help and information.