The late '70s and early '80s: Sporty, Slim, Colorful (Bicolor) & Precise (Quartz); Yes, the current craziness for steel (monochrome) makes one forget that Bicolor was not only much more expensive than the steel entry- or starter-models but also much rarer in the late '70s and the '80s; needless to point out they were more accented and always more beautiful than the cheaper alternatives.