Disassembly of a Minox B camera with damaged shutter blades. I believe this is the same for a model III, and maybe similar for a model C.
part1: https://www.youtube.com/watch?v=cG_a1M3Yu3Y
part2: https://www.youtube.com/watch?v=kYuGxAr9OyI&t=569s
part3: https://www.youtube.com/watch?v=ZQ3C1oXH_KE&t=35s
part4: https://www.youtube.com/watch?v=vtgdbX4M6Jc&t=692s
The disassembly guides I was following are:
http://blargh.wpi.edu/~jski/projects/photography/Minox/Repair.html
http://www.submin.com/8x11/manuals/minox/how_to_repair_your_minox.htm
http://www.submin.com/8x11/manuals/minox/camera_craftsman.htm
Where to buy new shutter blades plus some info:
http://www.minoxdoc.com/parts%20&%20service.htm