Rare to find Winchester made P17 bayonet. 
Bayonets by Winchester are hard to find, and therefore more desirable. Winchester delivered about one-quarter the amount of U.S. M1917 Enfield Bayonets when compared to Remington. Winchester delivered about 395,894, whereas Remington delivered about 1,565,644. As such Winchester examples are seldom encountered, think this is only the third example I have had, plus it’s in  really great condition.