American Letter Mail Company. Red "Collect 6½cts, Boston Office" boxed handstamp on 1844 folded letter from Boston to Philadelphia, Pa., red "Forwarded by, American Mail Co., No. 56 Wall St., N.Y." three line transit handstamp, Very Fine and choice; with 2001 P.F. certificate. Estimate  $200 - 250. $0 (Image)