Made in Chicago anywhere from the introduction in 1960 to the early 1980s. Schwinn used the old style welded frames for these bikes and heavy Ashtabula one-piece cranks so as others mentioned they were bombproof but exceedingly heavy. Ditto for the wheels which had chromed steel rims. Beginning in the early 1970s the Japanese began to export bikes with brazed steel frames and aluminum rims. Not bombproof by any means but a lot nicer to ride because of the substantially lower weight. I took a look at two used bikes in the mid 1960s. One was the Continental and the other a Fiorelli Italian bike. I picked the Fiorelli because it weighed much less and was the same price (plus it had low end Campignolo components). No regrets either.