Mexico, (Saltillo) Saltillo, two covers, 1850 to Durango, Yag/Bash ST8 docketed 14 May with cancel and 3r rate in red, and 1852 docketed letter to Durango (small tear at top), Yag/Bash ST9 docketed 7 December with postmark and 4r rate both in red, Stahlknect y Lehman correspondence, 2 pieces mounted on an exhibit page, Very Fine. Estimate  $75 - 100. $0 (Image)