I did not have your camera yet but manual few milimeters of sliding the film with thinking its ever needed would save you from future trouble. Can you post few images from the camera ? What lens its fitted with ? I would expect very low contrast , old fashion newspaper like prints from these cameras in bw.
But velvia would be wonderful with low contrast lens. I found that there is a eye catching aberrattions at these cameras , something like looking to a newspaper with magnifier. I found that look at the voigtlander lenses also.
Take care ,