Look like a well know NES collector is parting with his Grey NWC.
Up for sale is a genuine Nintendo World Championships 1990 grey cartridge. It is in good condition, works perfectly and is numbered #215. There were probably about 200-300 of these created and even fewer survived to this day. I received this game about 6 years ago in a private trade. These are quite hard to come by, as you can imagine.
The scans of the cartridge below as well as the screens shown below are of the actual cartridge you will receive. This is my husband, “Portnoyd’s” cartridge.