Although the Ducati has been compared to the Leica, it was a mechanically different camera. For one, the Ducati was a so-called half-frame format camera, while the Leica was full frame. As well, none of the lenses are interchangeable between the two lines. Both cameras used a horizontally traveling cloth shutter, but that's where any similarity ended.
The Ducati models with interchangeable lenses used a proprietary lens bayonet mount.
The lens had to be extended to allow the shutter to be released, and the lens could not be extended without removing the lens cap. These measures effectively prevented the all-too-frequent occurrence of the rangefinder photographer missing the shot because the lens cap hadn't been removed.
The cameras, lenses and accessories are very uncommon today.