1925 (25 Jun) Lithuania Kaunas - Konigsberg - Berlin - Hamburg, Airmail cover flight Kaunas - Konigsberg (Muller 6, CV $750) (Image)

1925 (24 Oct) Lithuania Kaunas - Konigsberg, Airmail cover flight Kaunas - Konigsberg (Muller 6, CV $750) (Image)

1926 (20 Oct) USSR Moscow - Konigsberg - Danzig, Airmail postcard with TWO flights Moscow - Konigsberg and Konigsberg - Danzig (Muller 11 (Russia) and 262 (Germany), CV $2,500) (Image)

1926 (19 Sep) USSR Kursk - Moscow - Berlin, Registered Airmail cover flight Moscow - Berlin, 'B' label for '?????????', All-Russian Society of Philatelists handstamps, Muller 16, CV $500) (Image)

1926 (21 Sep) USSR Kursk - Moscow - Berlin, Registered Airmail cover flight Moscow - Berlin (Charity for the Disabled Cinderella on back, All-Russian Society of Philatelists handstamps, Muller 16, CV $500) (Image)

1927 (20 Sep) Germany Moscow - Berlin - Brussels, Airmail cover flight Moscow - Berlin, 15k pair with shifted Map and dots in '5', Letter 'U' in Luftpost with dots on Russian airmail handstamp (Muller 24, CV $1,000+) (Image)

1928 (10 May) Latvia Riga -Moscow, Airmail cover to A.A. Kuindzhi, First flight Konigsberg - Riga - Moscow (Muller 332, CV $750) (Image)

1930 (24 May) Latvia Riga - Konigsberg - Roszel, Airmail Registered cover, flight Riga - Konigsberg (Muller 333, CV $1,000) (Image)

1929 (2 Sep) Latvia Riga - Berlin, Airmail Registered cover, flight Riga - Berlin (Cash on delivery label, Muller 373, CV $350) (Image)

1933 (8 May) Lithuania Kaunas - Berlin - Taucha, Expres Registered Airmail cover, flight Kaunas - Berlin (Franked with Full set, Muller 14, CV $350) (Image)

1934 (24 Jul) Latvia Riga - Berlin - Aschaffenburg, Airmail cover, flight Riga - Berlin (Muller 41, CV $450) (Image)

1928 (10 Jul) Iran Teheran - Moscow - Konigsberg, Airmail cover, flights Teheran - Moscow, Moscow - Konigsberg (Muller 19 (Iran) and 11 (USSR) CV $4,000) (Image)

1930 (25 May) Iran Teheran-Moscow-Berlin-Vienna-Belgrad-Athen, Airmail Registered cover, flights Teheran-Baku, Baku-Moscow, Moscow-Berlin, Berlin-Vienna, Vienna-Belgrad, Belgrad-Saloniki (Muller's catalog numbers see in description, CV $6,300) (Image)

1929 (22 Jun) Sweden Stockholm - Berlin - Moscow, Airmail cover, First flight Stockholm - Berlin, Berlin - Moscow (Muller 80 (Sweden), 262 (Germany) CV $1,300) (Image)