[The Society of Calligraphers envelope] (W.A. Dwiggins)

An empty envelope is worthless save for its potential to hold a letter. This one is no different save for the fact that it has a return address lettered by Billy Dwiggs. He had Studio No. 201 at 30 Ipswich Street in Boston from 1922 to 1929, but we have reason to believe that this is from 1923ish. A rare thing.