Colt 1877 lightning double action revolver, cal 38 Colt

 Colt 1877 lightning double action revolver, cal 38 Colt  , serialnumber 135176, built in 1902, all matcnhning. 
The bore has light markings, 

The revolver is in excellent condition, retaining overall 85 to 90 % of the blue, 60 % muted casehardening, perfect grips, and truly works super in single and double action. , very tight and superior shooter. 100 % correct.