A yellow plastic cover with a clear window. Top right had in black texta reads AAP 7513.053-3M. In black reads Royal Australian Airforce with their insignia above. Under this reads Engineering Publication. Throug the window on yellow cardboard reads AAP 7513.053-3M Fuel Contents Gauge Amplifier Including Code No. FAA (Smiths)royal australian airforce - manuals, royal australian air force, engineering publication, fueld contents gauge amplifier