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.
American Fridge Freezer BEKO GNEV321APX FRIDGE DOOR SHELF 43x13x11cm
American Fridge Freezer BEKO GNEV321APX *FRIDGE* DOOR SHELF H-7cm
Beko TLDC671W Fridge Door Handle - White 4872690100
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Beko TRD673APW Fridge Door Handle - White 4872690100
Beko TFF685APW Fridge Door Handle - White 4872690100