3 Kopecks workers with hand stamp overprint "Eesti post", block of four with two overprint tete-beche pairs - because the upper stamps each a inverted overprint carry, cancelled "ELVA plus EESTI plus B 14. VIII. 41", very fine, expertise Thilo Nagler VP (2025) "genuine and immaculate", Michel 3.600.- (what little is as four single stamps including the inverted overprints = 3.700.-)