Cannondale started out in the '70s (or the '60s?) making cycling clothing and accessories and began making aluminum bikes (at first, just touring bikes) right here in the bad ol' US of A in 1983. My latest acquisition is an early specimen, made in '84 but spec'ed in '85. At the time, it was the company's top-of-the-line tourer and tipped the scales at an impressive 22 lbs, pretty amazing for a touring bike. While the '85 ST500 doesn't have the cantilever bosses that we've come to associate with touring bikes, it's got ample clearance for fenders, a lengthy wheelbase, double eyelets front and rear, and a few other things that suit it well for long hauls.
It's worth noting that the original Huret Duopar Eco derailleur shifted beautifully, but I replaced it anyway with the Cyclone MkII unit below because of a concern over the durability of the dainty Huret gear-changer.