Unknown german 7,5cm cartridge WW2

[JohnR]

Hello

I found this case. It measures 495mm in lenght.
The headstamp says:
guo 7,5 cm 36H
21 WaA
1941

My first tought was an 7,5cm KWK40 but the problem is that there is no neck is seems a straight cartridge
Any ideas about this case?

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[Alpini]

It's a case for the dutch 7,5 cm Vickers AA gun. The german Navy used captured guns of this type and developed own ammunition for this gun.

"guo" is the Artillerie Inrichtingen Hembrug-Zaandam. I think propellant was delivered by "dbg" = Dynamit AG, Werk Düneberg, Lot number 8888