Definitely agree on the CLA - every couple years or 5-600 rolls of film, whichever comes first, is a decent rule of thumb.
Point of petty trivia - an F1 would be a Canon - Canon's answer to the Nikon F2 in fact, though it first marketed a few months prior to the F2's introduction, but that's sorta nit-picky.
I've been a Nikon user since the very early '60s, btw, and still have and use gear, including bodies, finders, backs, drives, lenses, and assorted accessories purchased anywhere from the late '60s (including a beloved, well-worn -it once was black but now is mostly burnished brass
- F FTn w/Apollo screen) into the 21st Century. Sharpest, crispest pieces of 35MM glass I've ever owned have gotta be the old 105 f/2.5 (bought in '67, I think) and the old 55 f/2.8 Micro (bought somewhere around '70, '71 if I recall correctly) - still love and use 'em. The 105 is perfect for portraits - if you put a modest difuser on it; otherwise its too damned sharp - it'll pick up the shadows of facial hairs on it own
Sidebar - something I learned to take advantage of long ago was that if you were wearing a film canister-festooned, beat-up tackle vest, a wide-strap web harness holding 3 or 4 sorta scruffy-looking, motorized Fs and F2s (at least 1 with a side-mounted tilt-head potato-masher-style flash unit, and at least 1 other with a
BIG lens) ready-to-use, with mebbe a well-worn Leica M3 slung around your neck, lugging a big, well-stuffed camera bag slung behind your hip, and looked like you belonged, everybody - even cops and security - assumed you belonged; you could go damned near anywhere without question or interferrence. The papparazzi just about brought those days to an end - nowadays you pretty much gotta have visible press cards and security badges - along with all the gear - to get yourself into places normal folks reasonably should be kept away from
.