I need identification for this 7,92x57 casings manufacturer symbol.
Hugo Schneider, Leipzig.
Joe, this symbol is a monogram formed by letters “O” and “S” and indicates that the case was manufactured by Oberschlesische A.-G. für Fabrikation von Lignose Schießwollfabrik für Armee und Marine, in Schönebeck (Elbe), Germany.
Ah! Maybe not Hugo Schneider then…
Jim, sorry, it was easier to post my answer than to start editing. This manufacturer and its symbol can be found in several publications, although some fail to mention that the letters are intertwined, so you can also find it listed as “OS”.
This company also had an explosives factory at Kruppamühle, Kingdom of Poland (today’s Krupski Młyn, Poland) which today exists as Nitroerg SA.
Jim, thanks for the initial.
Fede, as always, thanks for the answer.