S inc la ir ' s ▁ 1 9 7 8 ). ▁During ▁this ▁time , ▁it ▁seemed ▁model ▁production ▁was ▁more ▁a ▁side ▁interest ▁to ▁the ▁tool ▁and ▁die ▁business , ▁as ▁only ▁relatively ▁few ▁models ▁were ▁introduced ▁through ▁the ▁ 1 9 7 0 s . ▁Trad itionally , ▁models ▁were ▁supplied ▁in ▁' top - up ' ▁and ▁' top - down ' ▁versions ▁each ▁being ▁painted ▁in ▁just ▁one ▁color . ▁ ▁R IO ▁models ▁were ▁always ▁ 1 : 4 3 ▁scale ▁and ▁models ▁were ▁ult ra ▁detailed ▁with ▁between ▁ 4 5 ▁and ▁ 7 5 ▁individual ▁parts ▁( S inc la ir ' s ▁ 1 9 7 4 , ▁ 2 – 3 ). ▁Mod els ▁seem ▁chosen ▁for ▁a ▁combination ▁of ▁popular ity , ▁r ar ity , ▁and ▁unique ▁design , ▁tra its ▁consist ently ▁making ▁Rio ▁se lections ▁appe aling . ▁At ▁first , ▁most ▁models ▁were ▁vehicles ▁chosen ▁from ▁the ▁European ▁Br ass ▁era ▁and ▁from ▁the ▁ 1 9 2 0 s . ▁This ▁favor it ism ▁toward ▁earlier ▁cars ▁is ▁seen ▁in ▁the ▁standard ▁R IO ▁logo ▁of ▁two ▁different ▁autom obile ▁horn s ▁from ▁the ▁br ass ▁era ; ▁a ▁fancy ▁s nake ▁and ▁more ▁m und ane ▁tr ump et . ▁ ▁Later , ▁models ▁of ▁vehicles ▁all ▁the ▁way ▁up ▁to ▁the ▁ 1 9 6 0 s ▁and ▁ 1 9 7 0 s ▁were ▁produced , ▁such ▁as ▁the ▁Cit ro en ▁D S