Help in identifying a vintage nib

[Vintage_BE]

Might anyone be able to identify the manufacturer and/or brand of this vintage nib? It is a “donor” nib that was fitted on one of my pens by Guillaume Chappuis of watchandwrite.com.  Guillaume believes it’s of Italian origin but does not know more.  It is one of my favourite writers, with quite a bit of flex and a medium fine tip that gives just the right amount of feedback.

Thank you.

[OMASsimo]

Do you know anything about the spender pen? The nib looks 1930s to me. The design of the imprint looks more German than Italian to me. But you could try to post your question in the Italy sub-forum. Could be that one of the experts there might recognise it if it’s Italian.