Huntington MG1 Military Bearing / Lensatic Compass, Professionally Liquid-Dampened, Full Metal Body with Bearing Prism / Lens System (K4580 GR US)
Spec: Thumb ring, north line with north arrow bubble level
Compass rose with 360* scale inch scale
Base table housing
Lens prism veytically adjustable sapphire bearing cm scale
Sta thread
Sighing window with sighting line lid