Buck Knives is an American knife manufacturer founded in San Diego, California and now located in Post Falls, Idaho.
The company has a long history through five generations of the Buck family from 1902 to the present day.
Folding lock-blade knives and "Buck Knife" thereby became strongly linked in the public mind, and the Buck design was much imitated, so that a buck knife, has come to mean any folding lock-blade design, even while Buck Knife is yet a trademark and not limited to folding lock-blades.
Buck Knives has produced art knives for and under license with other companies and organizations such as: the National Rifle Association, the Boy Scouts of America, Colt Firearms, Anheuser-Busch (Budweiser), Republic Studios, Harley Davidson, Indian Motorcycles, Ford Motor Company, Chevy Truck, Elvis Presley Estate, John Wayne Estate, Roy Clark, Purina, NHRA, Monroe Auto and Ducks Unlimited.
I am not positive if there are "some" knives out there with the original marks for those 2 years, but it is possible.