The Colt New Line was a single action pocket revolver introduced by the Colt's Patent Fire Arms Manufacturing Company in 1873. Two years after the Colt House Revolver (1871), a year after the Colt Open Top (1872) and almost simultaneously alongside the Colt Peacemaker (1873), the Colt New Line was one of the first metallic cartridge rear-loading revolvers manufactured by Colt's. It was, alongside the Colt Open Top Pocket Model Revolver (1871), one of the first pocket metallic cartridge revolvers made by the company.
When the Rollin White patent for metallic cartridges firearms manufacture expired (c. 1870) the Colt's Patent Fire Arms Manufacturing Company started working on its own metallic cartridge revolvers (until that it had been practicing the so-called Richards-Mason conversions). Thus, after having introduced its first rear-loaders in 1871 (Colt House/Cloverleaf) and 1872 (Colt Open Top), in 1873 Colt launched the Colt Peacemaker along with a new line of pocket revolvers, sorted in five different calibers. Since it was an entirely new line of revolvers this model was called the Colt New Line.
Circa 1884-1886, submerged by the competitors' cheaper imitations and refusing to introduce a lower quality among its own firearms, the Colt company dropped the line and ceased production.
The Colt New Line was chambered and produced as follows.
The .22 caliber version was equipped with a 7-shot cylinder. All other four versions of the gun had 5-round cylinders.