Prüfrex light coil, 6V 17W, made in Germany, high quality, suitable for Bosch ignition systems 17W, used on Kreidler Florett K53/K54 up to 1960, Prüfrex no. BL 38/17/2, Bosch no. LMAN 6Z 2Z, suitable for Bosch ignition no. LM/UPA 1/115/17 L 2, limited quantity available.