The Nikon FM is a mechanically operated, interchangeable lens, 35 mm film, single-lens reflex (SLR) camera. It was manufactured in Japan between 1977 and 1982 by Nikon. It is predecessor of the FM2. These photos below were shot by photographer Nigel Kong showing beautiful portraits of the Nikon FM chrome version. According to Camerapedia, the Nikon FM chrome is a later-production FM model which lacks the knurled ring around the shutter release, while the exploded diagram immediately below that photograph clearly shows an earlier FM which does have the knurled shutter release lock/motor drive interconnect switch.
(Photos © Nigel Kong)