poster stamp

(philately, advertising) A label, resembling a postage stamp, issued to advertise or commemorate a product or event.

Japanese Meaning

製品やイベントの宣伝・記念を目的として発行される、郵便切手に似たラベル / 広告用または記念用に作られた、郵便切手の形状を模した記念切手

At the philately fair, he bought a colorful poster stamp commemorating the city's founding to add to his collection.

切手展で彼は、市の創立を記念したカラフルなポスター切手を購入してコレクションに加えた。

Sense（1）

(philately, advertising) A label, resembling a postage stamp, issued to advertise or commemorate a product or event.

poster stamps

（ plural ）