Original U.S. WWII USAAF Bomber Bubble Sextant AN-5851-1 in Bakelite Transit Case - dated 1943 ZB 26-ZB 30 just a bit of scuffing

just a bit of scuffing and flaking due to years of storage

They fall into two groups: blocks marked D

and was not blued in 1917 when the specification was changed or parkerized when reissued

low-built car with a compact pick-up body was shown in a 1933 article in Popular Mechanics Magazine

Original U.S. WWII USAAF Bomber Bubble Sextant AN-5851-1 in Bakelite Transit Case - dated 1943 ZB 26-ZB 30 just a bit of scuffingOriginal Item: Only One Available. This is a very nice U. S. Army Air Forces Bubble Type Sextant with Altitude Averaging device, USAAF part number AN 5851 1, in very good condition. These were used for night time navigation about WWII Aircraft, designed to hang from a suspension arm in the bubble canopy of a military aircraft. These were used in Bombers such as the PBY and B 17. It comes complete with its black Bakelite Case Transit chest, which would