The Adrianov compass () is a military compass designed by Russian Imperial Army topographist in 1907. Wrist-worn versions of the compass were then adopted and widely used by the Red and Soviet Army. Available at Pennsylvania State University Library Some of the older production examples are slightly radioactive because of Radium-226 used in their dials. Newer ones, with teal or white paint color, use the non-radioactive phosphorescent paint.
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