Unknown Uniface coin with 3 arms

[aidab]

Hi,
This silver uniface coin weights 0.2 aprx. and its diammeter is about 12 mm. It shows 3 arms (one with lion facing left and other with lion facing right) with a letter I between two points above.
I would appreciate any help to identify it.

[didius]

Ich denke das ist ein "Einer" aus Pfalz-Neuburg; 16. Jhd.;
Bin aber nicht ganz sicher!
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I think it's from Pfalz-Neuburg, but i'm not completely sure.