1922 (7 Jul) RSFSR Mosscow - Konigsberg - Berlin, Registered Airmail cover, flight Moscow - Konigsberg (Overpaid 65 Rub, Muller 8, CV $2,500) (Image)

1922 (22 Aug) RSFSR Moscow - Berlin, Registered Censored Airmail cover, flight Moscow - Konigsberg (Overpaid 45 Rub, Signed Mikulski, Muller 8, CV $2,500) (Image)

1922 (2 Nov) RSFSR Moscow - Konigsberg - Berlin, Airmail cover Winter irregular flight Moscow - Konigsberg (Muller 8, CV $2,500) (Image)

1922 (18 Dec) RSFSR Moscow - Konigsberg - Berlin, Registered Airmail cover Winter irregular flight Moscow - Konigsberg (Overpaid 5 Rub, Signed, Muller 11, CV $2,000) (Image)

1923 (28 Mar) RSFSR Petrograd - Moscow - Konigsberg - Berlin, Registered Airmail cover Winter irregular flight Moscow - Konigsberg (Red Petrograd Airmail label, Muller 11, CV $2,000) (Image)

1923 (12 Sep) RSFSR Petrograd - Moscow - Konigsberg - Berlin, Airmail postcard (from a period of the Provisional government) flight Moscow - Konigsberg (Red Petrograd Airmail label, Muller 11, CV $2,000) (Image)

1926 (11 Jun) USSR Leningrad - Moscow - Konigsberg - Berlin - Kiel, Airmail cover flight Moscow - Berlin (Red Petrograd Airmail label, Muller 24, CV $1,000) (Image)

1923 (19 Sep) Germany Berlin - Moscow - Beijing (China), Registered Airmail cover flight Konigsberg - Moscow (Moscow Airmail handstamp, Muller 160, CV $1,000) (Image)

1924 (20 May) USSR Slaviansk - Moscow - Konigsberg - Berlin - Schwirsen, Registered Airmail cover flight Moscow - Konigsberg (Muller 11, CV $2,000) (Image)

1924 (25 Jun) Germany Berlin - Moscow - Beijing (China), Airmail postcard flight Konigsberg - Moscow (Moscow Airmail handstamp, Muller 160, CV $1,000) (Image)

1924 (14 May) Germany Berlin - Moscow - Beijing (China), Airmail postcard flight Konigsberg - Moscow (Moscow Airmail handstamp, Muller 160, CV $1,000) (Image)

1924 (6 Oct) Germany Berlin - Kaunas - Raseinai, Airmail cover flight Berlin - Konigsberg - Kaunas (Muller 156, CV $1,500) (Image)

1924 (19 Aug) Germany Berlin - Konigsberg - Raseinai, Airmail postcard flight Berlin - Konigsberg (Muller 156, CV $1,500) (Image)

1925 (21 Aug) USSR Moscow - Konigsberg - Berlin - Berchtesgaden, Airmail cover flight Moscow - Konigsberg (Muller 11, CV $2,000) (Image)

1926 (30 Apr) USSR Moscow - Berlin - Copenhagen, Registered Airmail cover First flight Moscow - Berlin (Franked with Full set of Airmail, Muller 24, CV $1,000) (Image)

1930 (27 Jun) USSR Moscow - Berlin - Frankfurt, Airmail Registered cover, Moscow - Berlin (Foreign Philatelic Exchange surcharge on back, Muller 24, CV $1,000) (Image)

1932 (20 Jun) USSR Moscow - Berlin, Expres Airmail Registered cover, flight Moscow - Berlin (Old and New Moscow airmail handstamp, Over-franked, Muller 24, CV $1,000) (Image)

1932 (14 Sep) USSR Moscow - Berlin, Registered Advertising Airmail cover, flight Moscow - Berlin (Franked with 'Airship' Block of four, Muller 24, CV $1,000) (Image)

1931 (4 May) USSR Leningrad - Berlin - Wandsbeck, Airmail Registered cover, First flight Leningrad - Berlin (3 kop Overfranked, Muller 41, CV $450) (Image)

1931 (18 May) USSR Leningrad - Berlin - Plauen, Airmail Registered cover, flight Leningrad - Berlin (Late Franked with (1924) Lenin set, 4 kop Overfranked, Muller 41, CV $450) (Image)

1933 (30 Apr) USSR Leningrad - Berlin - Chemnitz, Airmail Registered cover, First flight (after winter pause) Leningrad - Berlin, Berlin - Chemnitz (Muller 41 (USSR) and 360 (Germany), CV $800) (Image)

1926 (2 Oct) USSR Baku - Moscow - Berlin - Leipzig - Altenburg, Airmail Registered cover, flights Baku - Moscow, Moscow - Berlin, Berlin - Leipzig (Muller 16, 26 (USSR) and 285 (Germany) CV $2,850) (Image)

1926 (2 Aug) Germany Aschaffenburg - Konigsberg - Moscow - Milano - Brindisi - Manila, Airmail Registered cover, flights Konigsberg - Moscow, Moscow - ?? (Sent via wrong route) (Image)

1929 (12 Sep) USSR Irkutsk - Moscow - Berlin - London - Sydney, Airmail Registered postcard, flights Irkutsk - Moscow, Moscow - Berlin, Berlin - London (Muller 32 and 16 (USSR), 297 (Germany) CV $1,850) (Image)

1931 (6 Jul) Germany Dresden - Kobe, Airmail Registered cover, flights Dresden - Berlin, Berlin - Moscow, Moscow - Irkutsk (Muller 246 and 262 (Germany), 32 (USSR) CV $1,850) (Image)