This is a Winchester Model 1886 lever-action rifle chambered in .33 WCF.
According to its serial number, this model was manufactured in 1906 and shipped in 1907. It features a ‘Lightweight’ design with a 1/2 magazine tube. Notably, this firearm is distinguished from the standard model by its checkered pistol grip stock and additional checkering on the forearm, making it a unique variant.