Germany Oldenburg. Michel 15–19 ⊙ , Coat of Arms SET(5). Set with different line perforations. 1 and 2 Groschen appear to be perforation B (10). The 1/2 groschen has a thin spot. 1 Groschen is signed Richter. 2 groschen is scarce as perf. 10 but has a slightly rounded corner. EUR minimum 527 for cheapest type.