Once you've get a 70s-era rep and beat it up a bit, it will look old. Even if they don't know the model is from that era, the artificial aging will make it very inconspicuous, and it will not attract attention The key to this is to be subtle. It doesn't have to be banged about and scratched to [censored] like it's been dragged behind a car, but adding some scuffs, then polishing with a green Scotchbrite pad and a 4-sided nail-file will create the appearance of gradual aging, and knocks and scrapes from throughout a 30+ year lifespan, rather than all being inflicted in one hit Failing that, blend it in even more to 'student fashion' by wearing it on a fat-strap, so people see the wrist-strap without focussing too heavily on the watch... Worked for this guy
When I first got my 1655, I couldn't stand wearing it. I'd put it on, and take it off again almost instantly. Just read back a few years, and you'll see me slagging the 1655 down at any opportunity. As soon as I put it on a fat-strap, I really enjoy wearing it