THERMADOR MFG. CO. LOS ANGELES. CALIF. VOLTS 115-230 KW 6.7 CAT. NO. SU-7 I have a Thermador 1951 cook top, and the knob is broken, Color is white, Left rear knob and it about 13/4’’ in width The writing on it read. Off R F HI I R SIM G O MED H N LO T T MED-LO It also has a black arrow going down the middle pointing at off. Robalderton@aol.com 808-721-5195