roundoak,
Yeah, that's what I've come up with in my sources too.
There was probably a little cross-over too, as they used their supply of Douglas barrels. That's pretty common among rifle manufacturers: I have owned at least two pre-'64 Model 70 Winchesters with serial numbers that were "earlier" than the numbers are listed in the standard sources. This is because they had already made the actions, but didn't put the rifles together and sell 'em until a year later.
