7 1/2" bbl. w/grey patina & some light pitting in old spots visible. Gun has a very good bore, wood grips & mechanically seems to function well. No visible markings remain on exterior of the bbl. & the ejector rod appears to be a later replacement. Mfg. circa 1884. 

Manufacturer Colt, Model 1873, Caliber/Gauge 45 cal. , Class SA Revolver