今年2月,《民族乐器——拉弦乐器》特种邮票发行后,笔者先后收到京、津、沪三市邮友寄来的首日自然封,并对封上加盖的三地4种纪念戳作了比较,感到很有特色,特作介绍。北京的(中国集邮总公司和北京市集邮公司)两种纪念戳各为长方形和圆形,二者的主图分别是山水和祥云衬托下的不同状态的二胡,与该套邮票中的第二枚——二胡图紧相呼应(图)。上海的纪念戳 In February of this year, after the issuance of the special national musical instrument - stringed instrument special stamps, the author received successively the first day natural seals sent by the friends from the three cities of Beijing, Tianjin and Shanghai and sealed the four commemorative stamps Made a comparison, feel very unique, special introduction. The two commemorative pillars of Beijing (China Philatelic Corporation and Beijing Philatelic Company) are rectangular and round in shape. The main pictures of the two are the erhu in different states under the background of mountains and clouds, and the second Pieces - Erhu map closely (Figure). Shanghai memorial stamp