One of the most loved brands in the super-8mm world, most Nizo cameras have features no other camera has. Look specifically for the models with the automatic B-function (480-801), with this function the camera exposes one frame as long as is necessary before going to the next frame. I made a stop-motion movie with a Nizo 481 from the moon going down during the night. Besides you can fully open the the shutter.
Nizo S480, S560, S800, 481, 561, 801: YES
Nizo 106,116, S2, 136, 148, 156, Integral: NO
Just forget about the Nizo Integral serie.
What's your Nizo worth? Take a look at this list of Nizo+(camera,kamera)+-(heliomatic,nahlinse,integral): sold cameras for a value indication.