Los-Nr. 55

3 d. brown-red in horizontal block of 6, slightly cut-into to clear margins with small tear at upper left, used with black target cancel on large size triple-rate envelope (filing folds and tears, partly fixed) with adjacent red "MONTREAL JU 25 1853", bowed "CANADA" and "PAID" to Philadelphia. Unique example of a 3 d. block of 6 on cover; certificate Greene Provenance: Charles Firby Ed Richardson Warren Wilkinson (2007) Joseph Hackmey (2011)