Lot# 4455

1935 (Apr 4) airmail cover from Shanghai to Szeming (Amoy), Fukien province, affixed with Hong Kong print 30c airmail stamp tied by Shanghai bilingual cds. Postage underpaid to cover the increase of airmail fee and sent by normal mail with endorsed of special cachet“上海局 航空擡批 航空費不足 作平信發出”by Shanghai post office. Szeming(Amoy) arrival cds applied at back. Rare and Early usage of the Shanghai airmail special cachet. F-FV.