30 Kop. Agriculture exhibition \"Turkmen SSR\" with inverted overprint \"Eesti post\", tied by part of cancellation \"ELVA (B EESTI, . VI) II 41\", on face and reverse slightly browned - good legitimate condition, the total edition amounts to only 200 pieces - varieties with inverted overprint are very rare! Signed Nemvalz and photo expertize Loebbering BPP (2022)