5 Pfg Germania with hand stamp overprint "China", variety "double overprint", used "TIENTSIN 9 / 2 01", reverse rubbed spot (hardly to see! ) - otherwise faultless condition, photo expertize Jäschke-Lantelme BPP (2019), Michel 3.000.- - very rare stamp, there are only very few pieces with double overprint by of this denomination value known!