Very Old B&S Updraft Carburetor

I need help identifying this 50 year old plus updraft carburetor from a B&S 6 to 10 HP engine. Carburetor cannot be rebuilt per local reputable small engine repair shop. Amazon shows what appears to be an equivalent carburetor. I would like to get a part number if possible so I can order the equivalent replacement carburetor from a recommended source. I do not see a model number on the engine. I can also post a photo of the engine if needed. Thanks all.