Model quite similar to Standard Bisley, with flattop frame and dovetailed rear sight feature. Has removable front sight insert, all blued finish with case colored hammer only. Available with 7.5" barrel. Smokeless-powder models produced after 1899 utilized push-button cylinder pin retainer. Calibers same as standard Bisley. Colt manufactured 976 of these revolvers. Advice regarding appraisal would also apply.