From The Manufacturer/Wikipedia/People Smarter Than Us:
Some sporting rifles are just too good to die, like the Winchester Model 1886. The 1886 was originally produced from 1897 until 1935 and has been resurrected as the Model 1886 by Chiappa Firearms. The original Winchester Model 1886 was created by gunsmithing genius John Moses Browning. Unlike the weak toggle-link actions of preceding Winchesters, the 1886 incorporated two solid steel locking lugs that slid up on either side of the bolt when the lever was closed, thus making a rocksolid arrangement for the longer-cased big-bore cartridges that were gaining in popularity, specifically the .45-70 Government.