To determine the age of the Winchester Buffalo Bill Commemorative model with serial number WC 58347, you would need to consult Winchester's serialization records or a reputable firearms reference guide. These commemorative models were typically produced in the mid-20th century, often around 1967-1973. If WC 58347 falls within that range, it could be estimated to be around 50 years old or older. For exact dating, checking with a Winchester expert or reference material would be necessary.