Silva Expedition 54B Military Compass - Official AUS ARMY Model - S-35861 

Probably the most resourceful compass in the world for artillery; target acquisition and command posts. The Expedition 54B is a unique compass featuring both an optical precision sighting system and a SILVA 1-2-3 SYSTEM compass in the same unit, giving unbeatable precision and versatility in the field. Bearings can be taken with accuracy to within half a degree. 6400 mils on the graduation ring and 6400 mils and 360 degrees on the sighting scale. With beta light i.e. will give continuous light up to 7.5 years.

Romer scales.Tritium Beta light. NATO SN 6605-66-110-8985.  In 6400mls/360° for sighting (every 20mls and 1° marked). 6400mls on protractor graduation ring.Illumination compound Tritium 20mCi.

• Type of compass - Silva 1-2-3 System combined with a Lensatic precision sighting compass
• Compass capsule / needle
• Sighting System - Prismatic precision
• Magnifying lens - Yes
• Declination adjustment -No
• Clinometer - No
• Illumination / active time after activation in light - Yes 7.5 years
• Luminous compound
• Silicon friction feet - Yes
• Other - Patented red/black N/S lines in capsule