世界上所有事物都是发展变化的,邮票也是一样。170多年来,邮票在大小与形状、用途与图案、材质与印制方式等许多方面都有了很大变化。先说说邮票的形状变化。从“黑便士”问世后,早期和后来的绝大多 Everything in the world is evolving and the same applies to stamps. For more than 170 years, stamps have changed dramatically in many aspects, such as size and shape, use and design, materials and printing methods. Let’s talk about the changes in the shape of the stamp. From the “black penny” came out, the vast majority of early and later