1930 (9 Sep) Posted at Graf Zeppelin to Peiping, f.w. German 2m, tied by Graf Zeppelin cds. Transit Moscow (11 Sep), Manchouli (19 Sep).
1930 (9 Sep) Posted at Graf Zeppelin to Peiping, f.w. German 2m, tied by Graf Zeppelin cds. Transit Moscow (11 Sep), Manchouli (19 Sep). Arrived Peiping (22 Sep). Example of USSR airmail service after Sino-Soviet conflict.1930.9.9 齊柏林飛艇投遞，寄北京。貼德國航空票2馬克。9.11經莫斯科，9.19經滿洲里。9.22抵北京。中東路事件結束後，恢復蘇聯航空郵運之例子。
