R-, Imitation cross denarius/OAP Xw, Greater Poland?

On the obverse a cross in a radial surround, on the reverse a cross with circles between the arms in the course of the legend. Interesting hybrid imitation of a denarius - obverse similar to the reverse of CNP399, reverse referring to the reverse of OAP denarii. A rare and interesting coin from the early days of the Polish state. 1.17g., 17.5mm.