In article <489uoe$ej3@inet.atc-usa.com>, rwilson@atc-usa.com says...
(...)
>Actually, I seem to recall that the 2 Nikon F bodies I owned many years
>ago had some sort of a horizontal, rubberized cloth shutter that >synched at 1/60th of a second; definitely NOT titanium shutters. (..)

Actually, the F, F2, F3 shutter curtains were made of thin titanium foil covered with rubber, and were VERY durable (I never heard of one being damaged by a dropped cartridge or a misplaced finger - very unlike more recent shutter designs).
Hope this helps.