Need help to identify this Voigtländer brass lens

[maxi0909]

Hello Community, I just bought this beautiful Voigtländer brass lens, but I cannot find any exact info about it.

My Voigtländer lenses are newer in serial number.

The lens is 12cm high.
The engraving says "Voigtländer & Sohn Wien Braunschweig"
Serial Number 22280

And then there is a C engraved on the lens... That´s the problem why I cannot identify it. Never heard or read about the "C" type.

Thanks a lot