I just received NHS-103 and have been reading the articles with great interest!

This will probably raise more questions than answers, but I found the information about the cloth shuttered version serial no.s on page 13 in Uli's article on the Nikon F particularly interesting because I saw No. 6400166 last year in June and it definitely had a cloth shutter. The owner, Jojo, rewound his film and opened it up for me so I could take a look. Here's some photos of that camera. Unfortunately I didn't think to take a photo of the cloth shutter.

These first two shots were taken with my cell phone camera, so the quality is poor image
image

image

These shots were taken with my SP 2005 image
image

image