Inscription: (on head joint) SIMPSON/266 REGENT STREET (on middle joint) SIMPSON/LONDON/PATENT (on foor joint) SIMPSON/PATENT
A Checklist of European & American Flageolets, Recorders, & Tabor Pipes. 2. The Metropolitan Museum of Art. New York, 1989, pg. 9.
A Checklist of Western European Flageolets, Recorders, and Tabor Pipes. 1. The Metropolitan Museum of Art. New York, 1976, pg. 2.