Unknown uniface silver pfennig - sunface ??

[aidab]

Hi,
Once more, I would appreciate any help to identify this old uniface/einseitiger silver coin.
It weights 0,6 gr. and it's diammeter is 14-17 mm aprox.
It looks like a round face (sunface ??) ...

[Schwarzschaf]

"Wiener Pfennig" Friederich der Schöne als König. 1314 - 1330
mzst: Wiener Neustadt.
CNA 228 - Luschin102

Its a medieval Austrian Pfennig.
with greeting RC