Identification German WWI Artillery Shell casings brass and steel

Hello and thank for taking time to read this. I bought two shell casings at an online auction, one brass one steel, they seem to be from the same caliber, possibly 77mm? Any identification help would be much appreciated, thank you!

How to Identify Shell Cartridges From WWI, Gone Outdoors

Large calibre markings (The Western Front Museum)

WW1 Grapeshot? Or Shell Identification - General Ammunition Discussion - International Ammunition Association Web Forum

Identification German WWI Artillery Shell casings brass and steel - LATEST FINDS - U.S. Militaria Forum

Large calibre markings (The Western Front Museum)

Identification German WWI Artillery Shell casings brass and steel - LATEST FINDS - U.S. Militaria Forum

Large calibre markings (The Western Front Museum)

WW1 German brass shell case inscribed PATRONENFABRIK KARLSRUHE 1917 decorated with a large Chinese style dragon H50cm; and another brass 105mm shell case dated 1968 applied with twenty-eight Staybrite - Militaria, Weapons

Identification German WWI Artillery Shell casings brass and steel - LATEST FINDS - U.S. Militaria Forum

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