Exploring the World with » My GPS-TOOLS from the 50s « ... ******************************************************************* Monocular (8x21) = TURMON (No.2742292) CARL ZEISS JENA / Germany Curve Meter 1/8"Scale (x1..x100..x1000 w.Reset) = ALVIN(1114)/Swiss WWII Watch (w. fluorescent Radium Hands & Figures) = OLMA / Swiss Compass ( 0...360°, left-counting !) = FREIBERGER P.M./Germany ... and ... More / different TYPES of AZIMUTH-SCALES ... "Marsch-Richtung" ( 0...60 = "Seconds" on Watches, right-count !) also "NAUTICAL STRICH" ( 0...32 ) Explanation found in WIKIPEDIA: AZIMUTH-Scale of the »M2« Compass ( 0...6400 Mils, left count !) "Mils" used in military artillery, derived from 2π RADIANS in the circle: 2*3.1416 = 6.283 and rounded 6400 for calc-simplification. Using "Mils" allow also to estimate the size of an object in view. REM: !! Symbols "E" & "W" are exchanged to read proper in mirror !! Tech-Data +++ of this US-Military Compass »M2« can be found ... https://digital.library.unt.edu/ark:/67531/meta... impressum: ******************************************************************* © C.HAMANN http://public.BHT-Berlin.de/hamann 09/23/23 |