Great gun. Nice to see such a clean Model 12. In the Winchester catalogs I have, the Tournament Grade (or Gun) is offered only in 12-gauge, and many of the catalog texts only mention a 30-inch barrel.
1916 --
1916 Catalog.jpg
1920 --
1920 Catalog pg 114.jpg
1920 Catalog pg 115.jpg
1925 -- The text here does mention optional barrel lengths for the Tournament Grade --
1925 Catalog pg 42.jpg
1925 Catalog pg 43.jpg
By the July 1931 Winchester catalog the Tournament Grade (or Gun) is gone, replaced by the Standard Trap Grade, and the old Trap Grade became the Special Trap Grade.