Surgical tape, probably from c. 1950's. Can you think of an uglier way to mark an artifact? Some old timers did and I wish they hadn't. I sold this gouge to a friend, included some labels, and he corrected the situation. IMHO, if you can fit location info on a piece in some manner, direct or by label, that's still best, because the info will always travel with the piece. I appreciate the 21st century methods available, but records, hard copy or digital, can be lost or destroyed. Of course, you can't fit several lines of location text on a point!