Did any brand sight come from the factory installed on Winchester Model 1894s?

Yes, the Winchester Model 1894s were factory-installed with various brands of sights over the years. The most common factory sight was the Winchester "semi-buckhorn" rear sight, but other options included a flat-top rear sight and a front bead sight. Additionally, some models were equipped with specialized sights for hunting or target shooting, depending on the configuration and year of production.