Belling convection oven thermostat knob, marked 60-260 degrees and 3 function symbols, for models: 
BELLING: BELBR54DFRAU, BR1100DFCNG/LP, BR1100DFCRNG/LP, BR1100IB, BR54DFB, BR54DFC, BR54DFR, BR54DFW, BR900DFCNG/LP, BR900DFCRNG/LP, BR900IB, BR900IR
Richmond Dual Fuel 90cm ovens - this is the 5th knob from the left hand side