Colt medium frame lightning rifle cal 38-40

Colt medium frame lightning rifle cal 38-40, serialnumber 41831, buil:t in 1890. 
excellent bore and markings and the rampant horse is present on left side of frame. , left side has 70 % blue, right side 35,  barrel is medium grey with 15 % blue, orig. sights present, works excellent, stock is top, no scratches, as an extra it is fitted with a lyman sight on the tang.  works perfect, all original.