A rare WW1 period French essence (fuel) quantity instrument.
By M. Corset Paris - Breveté SGDG (French patent stamp)
Circa - 1917.
As used on French airships & larger bomber aircraft with higher volume fuel tanks
for longer duration flights.
The instrument is in good original condition with a clear dial. Originally a wire cable
was attached to a float within the fuel tank to register fuel used / remaining.
3.5" 8.9cm Dial.