two-line straightline handstamp with manuscript date, applied as receiving backstamp on folded letter with integral address leaf from Strasbourg, France, August 16 origin datestamp, endorsed "Steamer via Liverpool", "Br. Packet Boston Sep 5" exchange office datestamp applied upon arrival in the US, manuscript "5" due for postage to Wisconsin, cover edge wear and splitting along the folds, very fine strike, the unique example of the New Glaurus straightline and one of the gems of the Robinson Collection, ex-Risvold