Lot no. 6590

"Riga" ribbon postmark on lettersheet, endorsed "fb" (fribref=free letter) sent from Riga to Stockholm. The postmark was in used 1708-1710. In 1710 Russian troops invaded Livonia and Riga was captured in July. Seal on reverse cut out, otherwise very fine; certificate HOW (1991) A very rare and most attractive item.