The model number is normally found inside the fridge or freezer. You will likely need to remove the salad drawer or freezer drawer to find the model number plate. Otherwise the model number is likely to be on the side or rear of the appliance.
Bosch Classixx Freezer Drawer Bottom 448601 (check fits list below )
Bosch classixx Fridge Freezer BOX SHELF DOOR freezer
Genuine BOSCH CLASSIXX Fridge Freezer Drawer Front CHECK MODELS 00660080 660080
Bosch CLASSIXX Fridge & Freezer Middle Door Shelf Rack Tray KGH KGN KSK KSR KDN
BOSCH Classixx Fridge Freezer Lower Drawer KIV28V KIV38V KIV38V00GB/01 KIV38X22