Bidspirit auction | Pre-philately. Letter written in Setúbal

Pre-philately. Letter written in Setúbal on June 10, 1853, sent from Franca, with the markings SETUBAL STB4, rar.6, in blue, and FRANCA Also from Setúbal STB PP4 rar.7, in blue. It has no inscription indicating the value of the postage paid, a very rare circumstance in pre-philately. It has a fold mark on the front. Very rare and with well-marked markings.