10 billion Mark on 50 million Mark, shade b black-opal-green, local overprint of OPD Königsberg (2. OPD issue), rotary top margin configuration -/1'5'1, stamp unused with hinge remnant, top margin with small crease trace, unsigned, photo certificate Dieter Weinbuch BPP (2021), "Examples of this issue with top margin and local OPD Königsberg overprint in this rotary-line configuration are uncommon", Mi. 750.-