Great Britain May 1st 1840 cover
The first stamp of the world was issued on May 6th 1840 but delivered on May 1st to post offices. This is the only example of usage on May 1st which is the first time ever in the world that a stamp was used on a letter. Unique and great world rarity.
英国:1840年5月1日封
世界上第一枚邮票于1840年5月6日发行,但在5月1日已发到各邮局。此封是唯一用于5月1日——全世界在第一时间把邮票用于通信的实例,为存世孤品及世界级的珍品。
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