Compass, Aircraft, Direct-Reading Magnetic, Type 51 w/Fishbowl Lens Frank Fighter made by Conn

made by Conn

By viewing the spirit bubble through the eyepiece

as used in B-17s (glass cracked)

See image of technical description of the system

The letters AC US ARMY are embossed on its face

Compass, Aircraft, Direct-Reading Magnetic, Type 51 w/Fishbowl Lens Frank Fighter made by ConnHere is a vintage Aircraft Compass, Magnetic, which we believe is a Type 51 made by Aeromarine based upon a similar model viewed online. We believe it to be a pre WWII model for civil aircraft, but interested parties are invited to do their own research. This compass is in exceptional condition given its age. The fluid is intact and clear. The teardrop shape case is unblemished. There are adjustment knobs at the bottom one for gross adjustment and the