"Only the French would engineer a crankset where the outer chainring is integral to the crank! "

I think the Japanese got there first with that particular innovation. Not sure, tho, but I see it on Lower-end Japanese bikes now and again, models earlier than I've seen said crank type on Pugs. If the crank is marked "Peugeot" it should take a standard 22mm puller. By 1980 the stock cranks on all Peugeots took the standard puller, even when the cranks were made by Stronglight. If it doesn't, likely is an old Stronglight puller, 23.35mm. Or maybe a TA. If the dust caps on the crank have an "S" it is a stronglight.