Johann Jakob Gretener (1850–1865 documented) Basel3rd quarter of 19th c.Boxwood; horn (clamps); brass (key) one keyL. 519 mm, 450 mm (vibrating)Donation Carl Birmann, Basel lnv. 1933.205.GRETENER / A BASEL (stamped insignia, head joint, upper joint, lower joint, foot joint)