Tachometer Type E-4 Weston 545 A-20 Havoc H-21 A gallon of avgas is

A gallon of avgas is ~ 6lbs

with an antenna wire connect from the top of mast to the top of the tail

and all components may not be present

This is a fine example of an early WWII-era German Wendezeiger (Turn and Bank) Fl 22402

Tachometer Type E-4 Weston 545 A-20 Havoc H-21 A gallon of avgas isHere is a WW2 vintage electrical Tachometer measuring up to 3500 RPM. This is the type used on the Douglas A 20 Havoc attack bomber (see photo of instrument location on the A 20 cockpit panel as illustrated in its flight manual) as well as the C 45 Expeditor transport (both aircraft used 2 each). The anchor symbol of the US Navy appears on the rear of the instrument, so it may have been used in an aircraft of the US Navy. Measures 3. 25 inches