A suffix letter may be added to some LIST ID numbers to differentiate between different events, cancels, etc.
All covers are unaddressed unless otherwise noted.
All covers are cacheted and a brief description is given of the event being commemorated. If covers are autographed they are genuine. V ACES satellite launch, Advanced Experimental Communications Satellite, military satellite communication systems program. V SALT satellite for Reconnaissance over Soviet ICBMs to police July 1 construction deadline, fails to orbit. V BIG BIRD 3, SALT reconnaissance satellite launched to provide first close-in look at Soviet missiles since the arms agreement.