60 penny on 75 penny, 3 examples in each case all 3 overprint errors, all date-appropriate cancellation, no. 72 I "overprinted value in stamp centre" expertized Infla and Kniep BPP, no. 72 III "overprint bar interrupted" and no. 72 IV "overprint Denzig" expertized Infla and Soecknick BPP, Michel 700,-