That's a highly unusual camera with a bicycle chain thrown into the mechanics. And of course it has Voigtlander's focusing dial/knob.
I never really cared for the "focus by knob" approach with a camera that is to be held at eye level. Sometimes, it seemed like Voigtlander did things just to be different. Like that massive plunger on the Vitessa. Oh well, I'll save that rant for another day.