The .475 Turnbull was made in less than 100 #1's, according to Turnbull. It's a 26" C weight barrel. With scope mine weighs 9lbs 2 oz. The cartridge has 95% of the .458 WM's capacity...
So without the scope it's more or less a 7½ lb .470 Nitro. It is very handy, and the most accurate big bore I have ever shot.