Super-Hot US Army Lesnatic Marching Compass
Manufactured for the U.S. Army Corps of Engineers circa 1942–1945 by Superior Magneto Corporation, Long Island, NY.
This compass is fully functional, but the phosphor ( indicating north south, east and west) is barely luminous under UV light due to phosphor destruction.
Fast Ra-226 Calibration:
A spectrum of this specimen (with data logged beyond 2204 keV) was captured in just 3 minutes using the Radiacode 103, with an average of 834,000 CPM, as shown in the last photo. The Radiacode 102 took 4 minutes to calibrate, averaging 780,000 CPM (not pictured)
Point-source measurements with the Radiacode 102 and 103 were well over 20 mR/h (gamma only) on contact. To comply with regulatory requirements — including the 0.5 mR/h package surface limit (beta + gamma) — the compass will ship inside a lead envelope in a twelve inch box!
Devices not included
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