1941 Latvia under German occupation Michel #4 block of 4 with the bottom right stamp 1911 instead of 1941, extremely scarce, See scans, $4 for insured shipping in the US, or $15 for registered shipping out of the US. Good Luck Bidders.
The following is an English translation of the documentation:
Latvia German occupation 1941 Mi. no. 4 20k overprint version Yehreszahl 1911 instead of 1941 previously unknown version. Checked & signed Krishke