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 Bottle Shelf Bottom Door Shelf Rack Tray For Fridge Freezer KUR15A50GB/03
Bosch Bottle Shelf KGN39VL31G/18 KGN39VL31G/19 KGN39VL32/17 KGN39VL32/18
Bosch Bottle Shelf Bottom Rack KGV39VL31/05 KGV39VL31G/01 KGV39VL31G/02
Bosch Bottle Shelf KGN39VL31G/06 KGN39VL31G/08 KGN39VL31G/11 KGN39VL31G/17
Bosch Bottle Shelf KDV29VW30/17 KDV29VW30/18 KDV33VL32/10 KDV33VL32/11
Bosch Bottle Shelf KGN36VLEA/36 KGN36VLEA/40 KGN36VLEAG/01 KGN36VLEAG/02