geez, all that DNA on the grip made quite a mess!
just looking at what Michael Sinclair's restoration book says about Winchester and it isn't alot. he indicates that they had sold out to H-I by 1935, but imply that they continued to use the Winchester name for some time. The H-I rods apparently had the Winchester label, with the model name just upstream in white ink, with writing heading back toward the grip. Unless yours has been redone, it appears to be black and heading away from the grip, so that sounds like it was on the upstream side of '35, eh? I'll keep digging until Phil gets off the river.
Ha...now that's funny...I see Phil got off the river while I was droning on
Re Phil's last comment, that's pretty much what Sinclair says as well...and they had Edwards there til 1924. However, they made three grades of rods and there was substantial variation across those grades.