A Martin 250ce mid upper gun turret ammo feed motor (booster).
This turret type was fitted to - Mk X Avro Lancaster, Liberator, Mitchell and Douglas A20 wartime bomber aircraft.
This 'New Old Stock' Feeder/Booster unit is in Excellent condition and was taken out of its cardboard storage box (box now missing).
It is complete with double sprockets for aligning & feeding the .50 calibre Browning bullets to the gun, and has the two screened power & control cables with plugs, still attached.
The sprockets turn nice and smoothly, so we think the unit is probably working, but cannot guarantee this.