That is indeed the correct crank for a cotterless upgrade to a Peugeot. I am happy with the Sugino I put on my UO-8, but your crank is prettier. I can't believe how well your UO-18 cleaned up -- my UO-8 is really showing its age now.
In the early 1970s when I worked at a Peugeot dealership, it seemed that every female customer wanted a white UO-18. When I told the boss I wanted to get a new bike for my wife, his initial reaction was, "I can't get my hands on enough UO-18s, particularly 22-inch ones!" He was relieved when I told him I wanted to buy her a bare UO-8 frame to custom build.
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"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069