It was possibly engraved by Tue. The engraving was probably done in 1926. I don't think Gough was engraving Savages that early.
Tue's death occurred in June 1927 so a ship date of March 1927 is cutting it close. Shame the warehouse date was not included.
As you mention, the rifle was possibly produced in 1926.
The circumstances of Tue's death are unknown although an obituary said "...after a long illness".
In 1926 Gough was at Fox in Philadelphia and is well known to have done much contract work from there.
Records and opinions believe Gough engraved a 22HP #133xxx/1913 and a pistol #226xxx/1920.
Gough did this Colt in 1933 which would have been from Utica.
You'd have to use optics and lay examples side by side and "maybe" could make judgement.
But even experts have difficulty using the inspection method on unsigned guns and generally rely on anecdotal information to narrow it down. (which we have done)
A person could also go down the Tuft's Lyon Firearms Co. rabbit hole and see if anything turns up. They were in L.A., sold to Hollywood. ?? hmmm...