More information could be helpful such as which numbered Air Force, Group and
Squadron. Geographical location and time frame could be helpful too. I am
sure there are a lot of sites about the Mustang.

John Dupre'

From: "eg"

I am trying to get some information on a P-51 mustang called "Spare Parts".
My wifes grandfather worked on this plane while he was in WWII. Said it was
his favorite airplane. He was a mechanic and help build this plane from
three that were damaged.