Colt Baby Paterson №1 3d model. Colt/Ehlers Pocket Model Paterson Revolver No 1 (also known as “Baby Paterson” or “Fourth Model Ehlers”) manufactured by John Ehlers c. 1840-1843 following the bankruptcy of Samuel Colt’s Patent Arms Manufacturing Company using Colt Paterson components. The diminutive Baby Paterson/Fourth Model Ehlers revolver is the smallest Colt percussion revolver.