EK II Spange - which maker?

[Dedman]

Hello gents,
don´t you know to which maker is attributed this unmarked piece?
Is this common variant or somethign interesting?

Thank you!

[ben bijker]

It is an L/18, but it is either ground-dug or a copy, hence the severe pitting on the reverse....

[Dedman]

Thanks a lot! This one is ground dug, not a copy...