The Nikon F3 was in continuous production for 21 years, from 1980 to 2001, longer than any other "F" series professional camera model. There's a reason for that long run, the camera was used by many professional photographers, who aren't renowned for "tender" use of their equipment. Like the old Timex wrist watches, the Nikon F3 could "take a licking and keep on ticking"... Whether or not the camera had a "feeling of general indestructibility" or not, it was very reliable in actual use.

Jim