The 2020 Summer Sale - Sale 333 Day 2

1958-1962 a group of 5 First Day Covers mailed from Beijing to USA or Europe,
including C91, S21, S27, S31 & S39. All of them with postage uprated on reverse. VF-F.
1958-62年一組5枚北京寄歐美首日封，包括紀91、特21、特27、特31及特39等。背面均加贴邮资。上品。