Wittner tuning fork id: 8647 sku: 921-E-1 brandname: Wittner Details tuning fork, 4,5 mm., round, nickel plated, e1-329.6 Hz. Related products 921-G-1 Wittner tuning fork 921-415 Wittner baroque tuning fork a1-415 921-GIS-1 Wittner tuning fork 921-432 Wittner tuning fork 921-A-1 Wittner tuning fork