We've received a few, nice Big Horn Armory levers in 460 S&W and 454 Casull...clickable links and pics below to the individual listings with many detailed pictures:
Big Horn Armory - Model 90 Spike Driver Lever Action - .460 S&W Mag - 18" - Grade II American Black Walnut - Hunter Black Finish

Big Horn Armory - Model 90 Spike Driver Lever Action - .460 S&W Mag - 18" - Grade II American Black Walnut - Scout Scope Mount - Hunter Black Finish

Big Horn Armory - Model 90A Spike Driver Lever Action - .454 Casull - 18" - Grade I American Black Walnut - Hunter Black Finish

Big Horn Armory - Model 90 Spike Driver Lever Action - .460 S&W Mag - 18" - Grade II American Black Walnut - Hunter Black Finish

Big Horn Armory - Model 90 Spike Driver Lever Action - .460 S&W Mag - 18" - Grade II American Black Walnut - Scout Scope Mount - Hunter Black Finish

Big Horn Armory - Model 90A Spike Driver Lever Action - .454 Casull - 18" - Grade I American Black Walnut - Hunter Black Finish
