BERTHOUDS MULE TEAM EXPRESS, PD 25, STRAIGHT LINE EXPRESS COMPANY MARKING IN A BOX, RERATED '10' IN MS., USED WITH BLUE MOSTLY CLEAR TREASURE CITY NEV. DATESTAMP ON 3C GREEN ENTIRE (U84), TO PIOCHE NEV., REDUCED AT R. SLIGHTLY AFFECTING INDICIA, TRIVIAL TONED SPOTS, OTHERWISE FRESH AND VERY FINE, VERY SCARCE, LITTLE IS KNOWN ABOUT THIS NEVADA EXPRESS COMPANY, WHICH OPERATED CA. 1871 NEAR TREASURE CITY, EX CLIFFORD