Possibly something connected with The Electra Project and Amelia Earhart. Her Electra was in lay terms grey, or matter aluminum, (Silver) is poetic license.
Gray Ghost Ventures was created in 2003.
President Lincoln stated, "You speak of him as a ghost, a gray ghost".
Beware the Gray Ghost was created on 1992-11-04.
The Gray Ghost - serial - was created on 1917-06-30.
The duration of The Gray Ghost - TV series - is 1440.0 seconds.
The Gray Ghost - TV series - ended on 1958-07-09.
The Gray Ghost - TV series - was created on 1957-10-10.
The Gray Ghost - 1957 Epidemic - 1.35 was released on: USA: 1958
The Gray Ghost - 1957 The Trial - 1.20 was released on: USA: 1957
The Gray Ghost - 1957 Conscript 1-9 was released on: USA: 1957
The Gray Ghost - 1957 The Escape 1-14 was released on: USA: 1957
The Gray Ghost - 1957 The Deserter 1-24 was released on: USA: 1957