I believe I have nailed down the Si barrel code for Mauser.
I dont know if you have ID'd this but a source document from 1936 lists
"Silesiastahl G.m.b.H., Gleiwitz" as a recurrent suppler to Mauser in this year.
Thought you might need this tidbit.
There is also a listing for "Hagener Gusstahlwerke Remy & Co., Hagen that also supplied
steel components.
The RM value for each supplier is substantial, inferring that both of these firms supplied
large value material.
I dont know if you have ID'd this but a source document from 1936 lists
"Silesiastahl G.m.b.H., Gleiwitz" as a recurrent suppler to Mauser in this year.
Thought you might need this tidbit.
There is also a listing for "Hagener Gusstahlwerke Remy & Co., Hagen that also supplied
steel components.
The RM value for each supplier is substantial, inferring that both of these firms supplied
large value material.