Cygnus Covers

WANTED: The following Cygnus covers that i’m missing: # 4, 20, 22, 47, 48, 49 & 50. Can anyone help ?

My collection is shown below.


Cygnus Cover # 1 – Apollo 15 Liftoff – 26th July 1971:


Cygnus Cover # 2 – Apollo 15 Falcon is on the Plain at Hadley – 30th July 1971:


Cygnus Cover # 3 – Apollo 15 Sub-satellite Launch – 4th August 1971:


Cygnus Cover # 4 – Apollo 15

WANTED


Cygnus Cover # 5 – CAS A – 16th August 1971:


Cygnus Cover # 6 – Barium Ion Cloud – 21st September 1971:


Cygnus Cover # 7 – OSO 8 – 29th September 1971:


Cygnus Cover # 8 – ITOS B – 21st October 1971:


Cygnus Cover # 9 – DSCS 2 – 3rd November 1971:


Cygnus Cover # 10 – Mariner 9 – 13th November 1971:


Cygnus Cover # 11 – Ariel 4 – 11th December 1971:


Cygnus Cover # 12 – Apollo 16 Rollout – 13th December 1971:


Cygnus Cover # 13 – Intelsat 4F3 – 19th December 1971:


Cygnus Cover # 14 – Intelsat 4F4 – 24th January 1972:


Cygnus Cover # 15 – HEOS A2 – 31st Jan 1972:


Cygnus Cover # 16 – 10th Anniversary John Glenn Orbit – 22nd February 1972:


Cygnus Cover # 17 – Pioneer 10 – 2nd March 1972:


Cygnus Cover # 18 – TD 1A – 11th March 1972:


Cygnus Cover # 19 – Apollo 16 Launch – 16th April 1972:


Cygnus Cover # 20 – Apollo 16 Landing Delay – 20th April 1972:

WANTED


Cygnus Cover # 21 – Apollo 16 Moon Landing – 20th April 1972:

Coming soon…


Cygnus Cover # 22 – Apollo 16 Subsat 2 – 24th April 1972:

WANTED


Cygnus Cover # 23 – Apollo 16 Deep Space EVA – 25th April 1972:


Cygnus Cover # 24 – Apollo 16 (recovery with helicopter) – 27th April 1972:


Cygnus Cover # 25 – Intelsat 4F5 – 13th June 1972:


Cygnus Cover # 26 – Viking Lander Supersonic Flight – 11th July 1972:


Cygnus Cover # 27 – ERTS 1 – 23rd July 1972:


Cygnus Cover # 28 – Viking Balloon Test – 26th July 1972:


Cygnus Cover # 29 – Explorer 46 Space Dust Probe – 14th August 1972:


Cygnus Cover # 30 – Viking Subsonic Deceleration Test – 19th August 1972:


Cygnus Cover # 31 – Copernicus OAO C Stargazer – 21st August 1972:


Cygnus Cover # 32 – Apollo 17 Rollout – 28th August 1972:


Cygnus Cover # 33 – Explorer 47 IMP Flying Physics Lab – 25th September 1972:


Cygnus Cover # 34 – Apollo 17 The Last Moonship – 7th December 1972:


Cygnus Cover # 35 – Apollo 17 Moon Landing – 11th December 1972:


Cygnus Cover # 36 – Apollo 17 Farewell Mission to Moon – 14th December 1972:


Cygnus Cover # 37 – Apollo 17 Splashdown – 19th December 1972:


Cygnus Cover # 38 – NOAA 2 – 15th October 1972:


Cygnus Cover # 39 – ANIK 1 Telsat 1 – 9th November 1972:


Cygnus Cover # 40 – Nimbus 5 – 10th December 1972:


Cygnus Cover # 41 – ESRO 4 – 21st November 1972:


Cygnus Cover # 42 – AEROS – 16th December 1972:


Cygnus Cover # 43 – Satellite Data System – 20th December 1972:


Cygnus Cover # 44 – Pioneer 11 – 5th April 1973:


Cygnus Cover # 45 – Skylab 1 Saturn-V Rollout – 16th April 1973:


Cygnus Cover # 46 – ANIK 2 Telsat B – 20th April 1973:


Cygnus Cover # 47 – Skylab Orbital Workshop – 14th May 1973:

WANTED


Cygnus Cover # 48 – Skylab Trio of Spacemen – 25th May 1973:

WANTED


Cygnus Cover # 49 – Skylab 1 Hard Dock – 26th May 1973:

WANTED


Cygnus Cover # 50 – Skylab 1 Crew Returns Home – 22nd June 1973:

WANTED


Cygnus Cover # 51 – Explorer 49 RAE B – 10th June 1973: