pamphlet Directions for the use of artillery instruments : The radio link S.R. Mark I Equipment scales : For guns, machine, Bren .303-inch, Mks. I and II : issued by technical scale and S.R. section, M.G.O. branch, G.H.Q (I) Equipment scales : For carbines, machine, sten, 9-mm, Mks. I. I, II and III : issued by the technical scale and S.R. section, M.G.O. branch, …
