Is a Iver Johnson model 50 a sidewinder double and single action?

The Iver Johnson Model 50 Sidewinder is a double action revolver designed to look like a classic single action. The action (trigger/hammer) looks and operates exactly like any other double action revolver. However, IJ (as did a couple of other manufacturers from the 50's through the 70's) dressed the basic double action frame and lockwork with features more closely related to single actions like the Colt 1873.

Single action features include: faux stag grip shape and aesthetics, pinned (non-swing-out) cylinder, loading gate and integral ejector rod. Although the revolver can be fired in either mode, reloading the pistol follows the manual of arms for the single action genre (eject empties individually through the loading gate or completely remove the cylinder from the frame).