This is the version 3. It is identified by the ergonomic handle, the larger steam handle with a silver cap on it, and a steam wand that is mounted on a ball joint.

This is the version 2. It is identified by the smooth handle, the steam knob with ridges, and the plastic Rancilio logo.

This is version 1. The handle has ridges on it. The logo is silk screened on the machine.