Dmitry -
"Pennsylvania" or "Kentucky" is a term for a kind of rifle, not by any means the location of its origin. Generally we think of the long rifle as having certain characteristics... The long barrel, the patchbox or grease hole, a full length stock, etc. If studied closely one will soon begin to see regional traits imbued on these pieces.
NY long rifles from my area are no different from Pennsylvania rifles, except for a state border. They're in the main Upper Susquehanna type rifles. Move to the center line of the Fingerlakes and rifles take on traits associated more with the Mohawk Valley. Your gun tends to bear some of the traits we associate with an area roughly from Albany west to Buffalo and on into Ohio and even Michigan. Stock architecture, trigger guard, heavy barrel, etc.
Don't worry. The rifle is still part of the Kentucky/Pennsylvania tradition.