This is one of the first 1876 Winchester’s produced . These rifles were produced in honor of our Country’s 100 years anniversary and are sometimes referred to as the Centennial Model.  It’s a open top with the lowest serial number I’m aware of serial # 77.  The 28″ octagon barrel is in .45-75 cal. as are all the first models. The bore is good with strong rifling. The barrel and receiver  retain a pleasing blue brown patina . The wood is pretty nice with a good wood to metal fit.  The action is smooth and crisp. The rifle still retains it’s original cleaning rods in the butt stock compartment.  I checked Geo. Madis’  TheWinchester  Book  and he had no 2 digit 76’s listed.  Actually the lowest serial number listed was a 3 digit serial # 322. Rifle will come with a Winchester factory letter. This is a rare , rare Winchester! Sold