Markings on bottom of shell casing : r/MilitaryHistory

Large calibre markings (The Western Front Museum)

What do these markings tell me about this shell casing? I know

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Artillery shell cases, fuzes, primers and tubes. – Stephen Taylor

Artillery shell cases, fuzes, primers and tubes. – Stephen Taylor

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Anyone able to tell me what the markings on the bottom of this

Large calibre markings (The Western Front Museum)

Headstamp - Wikipedia

Huge 105mm casing, cant make sense of the markings. : r

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7.62×39mm - Wikipedia