Insured value

Quality: ✉

1866 N° 20 and 21, on cover, with unreadable dotted cancel, but departure stamp Bruxelles, dd. 15 ???? 1866, to Paris (France), nice "CHARGÉ" stamp in box black, "PD" stamp in box black, traces of wax seals on back, no value indication on letter, franked "1.40fr.", there is a manuscript indicating the weight, but is not clear (to the left of the "Chargé" stamp), f