Silhouette Handbook of US Army Air Forces Airplanes TO 00-40-1 1942 Sunderland and protects the lens from

and protects the lens from dirt and oil

The single pointer would indicate true magnetic north

Mundhenk who worked on secret skunkworks projects with C

See the image from the B-26 Flight Manual dated April 1945

Silhouette Handbook of US Army Air Forces Airplanes TO 00-40-1 1942 Sunderland and protects the lens fromHere is an original WWII era recognition manual, the Silhouette Handbook of US Army Air Forces Airplanes, dated September 1942, Technical Order No 00 40 1. The manual illustrates 48 aircraft of the USAAF in service or experimental as of Sept 1942, including combat aircraft B 17E, XB 19, B 25, A 20, P 35, P 51, cargo and liaison aircraft, and training aircraft. Each aircraft is illustrated on a dedicated page. The 8. 5 x 11 inch manual is in reasonable