Dumbelek, bottom, side, top, and perspective views, mechanical drawing

Drawing caption: Dumbeg [dumbelek].
Includes enlarged section showing construction and mechanism details, with dimensions noted in inches.
Original in Music Library, University of California, Berkeley.
Forms part of a group of field materials documenting Jack Bakalian performing Armenian music on the dumbelek on an unspecified day, collected by Sidney Robertson Cowell in Fresno, California.