Built on Farquharson Falling Block action. Chambered for many calibers up to .600 Nitro Express. Also a custom-order gun and barrel length was optional. Usually finish is blued with folding express sights. Select hand-checkered walnut stock. These were high quality firearms and values would be determined, for the most part, by options and embellishments on particular specimens. Individual appraisal is definitely advised. Caliber in which rifle is chambered will also have an effect on value. Obsolete calibers bring less and larger express calibers bring more.