Your seat post diameter will tell you whether it is a
PR-/PKN-10 (26.4 or 26.6mm) or a PA-10 (thicker tubes, smaller seatpost diameter).
My 1980 PKN-10 was arguably the best all-rounder I have ever owned, and it would still be mine, instead of my elder son's, if I were his height. I like my gears way too much to consider single speed, but everything else on your build looks great to me. That is a cool looking crank.
I don't know about the rest of you guys, but 3-bolt and 5-bolt crank spiders just look right to me. I find modern 4-bolt spiders hideous.
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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