The first Nikkormats (FT and FS) came out in '65... Cheating by a couple of years('67?) but my all time favorite is the Nikkormat FTn...
Good to know. I recall the first FTNs were being advertised in photo magazines, in those good old long ago days when we all bought and read these, in 1967, the year I went to work as a uni student at Expo '67 in Montreal - I was a junior PR grunt and it seemed to me every second pro shooter on the Expo site had a 'mat as well as an F. Old, old memories here, that was 54 years ago. Anyway, many thanks!!
Of all the Nikkormats, it seems (to me anyway) the FTNs are the most common models still in use. I used two in my time before moving up to ELs (which worked for many years, I finally sold them last year to someone who is using them still and loves them) and then bought two FT2 which I still have/use/intend to keep forever.
In my experience, the FTNs were even more robust than the FT2s tho the latter seem more 'ergonomic' to me, as they probably are as they are much newer (mid 1970s). Certainly Nikkormats were built to last, perhaps even more so than the Nikon Fs or at least their equal, given they are somewhat less versatile (user-friendly?) with that odd speeds 'wheel' on the lens mount and fewer accessories available like WLFs and screens, but the difference was they were amateur models and the Fs were designed for pro use.
Enough of this. It suffices to say many many 1965 or older cameras are still in use. As long as we accept their greatest limitation is when they break down they may be impossible to repair if spare parts are needed, long may they go on shooting.