The accompanying factory letter confirms the carbine configuration in .45-70 caliber and states the carbine was received in the warehouse on March 14, 1907 and shipped on August 19, 1907. According to research conducted by John T. Madl and presented in the summer 2018 issue of The Winchester Collector, Winchester only manufactured 1,911 Model 1886 carbines chambered in .45-70 caliber. The barrel is fitted with a pinned blade front sight and a folding ladder rear sight graduated to 2,000 yards. The top of the barrel has the two-line address legend ahead of the rear sight and "45-70" at the breech. Winchester factory oval proofs are present on top of the barrel and receiver at the breech. The upper tang is marked with the three-line model/trade mark information. The lower tang has the patent dates and serial number. Mounted with a standard carbine forearm and buttstock with carbine buttplate.