Original signed Robert McCall felt tip sketch of the Apollo 15 lunar module on the lunar surface with the manned lunar rover in the background on a light purple 9.25 x 4 First Day Cover. Signed in brown felt tip by Dave Scott and Jim Irwin and in black felt tip by Al Worden. Also signed in felt tip by the artist, Robert T. McCall. In fine condition, with light erased pencil remnants from a previous address. The Apollo 15 mission was the first to carry a lunar rover, which allowed the astronauts to travel much further from their landing site and sample a much wider variety of lunar materials. COA Scott Cornish and R&R COA.