measure it with calipers just to make sure. If it's a Pug with an English threaded BB then the steerer should be bog standard (I have 2 '85 peugeots and both have 1"steerers, albeit one had a slightly narrower crown race seat, like 0.4mm to narrow).
the steerer tube on a 1" threaded fork is actually 22.2mm in diameter on the outside
measure it with calipers just to make sure. If it's a Pug with an English threaded BB then the steerer should be bog standard (I have 2 '85 peugeots and both have 1"steerers, albeit one had a slightly narrower crown race seat, like 0.4mm to narrow).
the steerer tube on a 1" threaded fork is actually 22.2mm in diameter on the outside