Lot 20166 – 1901 (March 21). Commercial envelope from San Juan to Paris, three-countries combination cover

1901 (March 21). Commercial envelope from San Juan to Paris, bearing forerunner 2c pair in mixed franking with Puerto Rico 1900 1c, tied by duplex dispatch cancels, « T/Centimes 15 P.R. » double circle and three French postage dues 10c cancelled by triangle hs, a rare three-countries combination cover.