On high-end road bikes, brazed-on rear brake cable guides began to replace screw-on clips during the mid-to-late 1970s.
Steyr, Puch, and Austro-Daimler all were brand names used by the huge manufacturing conglomerate, Steyr-Daimler-Puch, of Graz, Austria. According to Harald Cap, whose father, Otto, founded Capo (the much smaller "other" Austrian bicycle manufacturer), SDP production reached about 100K units per year during the 1960s. SDP made a full line, selling most of its lower-end U.S.-bound units under the Sears and Steyr marques. The Puch label covered everything from the fancy-looking basic 10-speed "Bergmeister" to racing machines worthy of the Tour de France. Austro-Daimler, a classy-sounding brand of the 1970s and 1980s, also encompassed a fairly wide range of bikes, up to the highly respected, beautifully finished "Vent Noir."
Enjoy your new acquisition. I have first-hand proof that Austrian bikes are well-made and very durable.