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Details and Image
Type
Model #.
Aircraft Maker / Name
Instrument Maker
Country
Construction
Date
Scale Length
Area of Use
Disk
D-4
Generic
Felsenthal Instrument Co.
U.S.A.
Plastic
est. 1940's
Dia. = 10.9 cm
Flight Planning
Comment:
"Time, Distance, Speed, and pressure altitude."
Image 1
Image 2
Image 3
