RAF (Royal Air Force) sunglasses in container

WW2 British RAF (Royal Air Force) sunglasses in container (Spectacles, tinted). The container is marked Spectacles Tinted NOS 2 or 3 by Levers Optical Co Ltd. The sunglasses are having a wire frames with blue-grey tinted glass lenses, wrap around side-arms and leather side-shields. Hard to find and good condition!