More back issue browsing. This is Uncanny X-Men 141 from 1981, written by Chris Claremont and John Byrne, art by Byrne with Terry Austin inks.
Kitty Pryde has been sent back in time to her teenage self to try and warn the X-Men and get them to prevent the political assassination that leads to the passing of the mutant control act. So we get to see the 1981 X-Men fighting another version of the Brotherhood of Evil Mutants. But more importantly we see the remnants of the team who have aged and weakened. Of course Wolverine has survived and is sneaking around in his sneaky, hunter-killer mode.
This issue has a great cover as has the follow up in Uncanny X-Men 142.