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German 7.7cm casing
- Thread starter Gspragge
- Start date
Hello,
G=Württembergische Metallwarenfabrik Geisslingen (WMF, today famous for kitchen equipment made from Inox)
308=number of delivery
HL31=Acceptance stamp of the Hauptlaboratorium Ingolstadt
St=means the the case is thick walled, the exact meaning of the abbreviation is unknown. Some people think it means "Stark"=strong but I think it's something different because it' isn't sounding like "professional" german
The 67% copper stamp was added in late 1917 when the type of alloy was changed. It was added to not mix up these cases with cases with a different alloy during the recycling process.
G=Württembergische Metallwarenfabrik Geisslingen (WMF, today famous for kitchen equipment made from Inox)
308=number of delivery
HL31=Acceptance stamp of the Hauptlaboratorium Ingolstadt
St=means the the case is thick walled, the exact meaning of the abbreviation is unknown. Some people think it means "Stark"=strong but I think it's something different because it' isn't sounding like "professional" german
The 67% copper stamp was added in late 1917 when the type of alloy was changed. It was added to not mix up these cases with cases with a different alloy during the recycling process.
Last edited:
I found the document again. It's more complicated than I remembered. I am not sure if the following is valid for brass cases of other manufacturers,but it is valid for cases made by the AEG company. They delivered cases made from two alloys before the 67% Cu alloy was introduced:
Alloy No.1:
62-65% Cu
0,8% Pb
remaining part: Zi
Alloy No.2:
72% Cu
28% Zi
Cases of both alloys made by AEG had problems with hairline cracks and should be recycled. But both alloys should be recycled separately for not "contaminating the complete brass stock with lead". They recognized the type of alloy through the delivery number in the case headstamp because at this time no alloy stamp was in the headstamp.
Alloy No.1:
62-65% Cu
0,8% Pb
remaining part: Zi
Alloy No.2:
72% Cu
28% Zi
Cases of both alloys made by AEG had problems with hairline cracks and should be recycled. But both alloys should be recycled separately for not "contaminating the complete brass stock with lead". They recognized the type of alloy through the delivery number in the case headstamp because at this time no alloy stamp was in the headstamp.