This is the first issue of UR-100, with matrix # UR-100-B on the B-side. The record was reissued here: http://www.45worlds.com/78rpm/record/ur100 with matrix # 100-C "Sophisticated Blues" on the B-side, with the same catalogue number.
Note that the artist is shown as "Sepia Tones" on this pressing, and "The Sepia Tones" on the other.