Unid European 1726

This copper coin measures 23mm. The obverse has a crowned arms with a rampant lion in the top left quadrant, three vertical stripes in the right top quandrant and three diamonds in the lower half. There is a crozier through from the left and a sword through from the right. It looks like part of a 7 at the left of the shield and 26 at the right. Starting at 1 o'clock these letters show GEO and starting at 9 o'clock HES D.
The reverse has four shields in a cruciform. The top has four horizontal bars. the right one is too weak to see the features. The bottom has 3 items that look like the letter "u." The left one has a single thick horizontal bar. There may be another shield (crowned?) in the center. Letters running clockwise from the top appear to be --EI PRINC-PO:DUX BU----

Anyone have a clue to help me ID this? Thanks in advance.