Bidspirit auction | Pre-philately. Letter. Written in Fronteira

Pre-philately. Letter. Written in Fronteira on 10/7/1834, to Évora. Sent as being from the National and Royal Service. Postage exempt. FRONTEIRA mark, in sepia/black. FTR1. Rarity 9. Mark. Well-pressed with ink smudging. Very rare. Only one other letter is known.