The Turnbull used a 26" C weight barrel, so it should have been called a 1H. I will have to check one of my Turnbull boxes. Contrarily, the 45/70 1S-C used a 26" C weight barrel, but being a Lipsey's Exclusive, it was never called a 1H
El Numero Uno a Serious Collector of the Ruger No.1 rifle; a Modern Classic Sporting Arm