Originally Posted by sbarner

The Success front derailleur uses a spring pusher plate on the inside and actually shifts quite well, in spite of its Huret "Isn't there some way we can stamp this part out of flat plate?" heritage. There were only a few years at the end of the Paramount tandem production where they came with the Campagnolo crossover-drive cranksets, so it's likely a '77 or '78. These frames were the end of the long run of Schwinn fillet brazed models, using their own straight gauge chromoly tubing with sleeves inserted in the ends as reinforcements. I find it interesting that the Paramount tandem of the 1970s was an evolution of the 26" wheeled Schwinn Town & Country tandems that were the only ones they offered from post-WW2 to around 1960, when the welded Twinn was introduced. The T&C had upright bars and slightly different geometry, but it featured the "short-coupled," curved rear seat tube. They also came with a cool chainguard that covered the timing chain and eccentric front bottom bracket for timing chain adjustment. They were one of the few Schwinns that came with steel, cottered cranks. The Twinn was a solid step down from the T&C in almost every respect, and may have been the heaviest production bicycle manufactured in the 20th Century. The Paramount tandem appears to be almost identical to the T&C with the exception of the geometry and components, even down to the round fork blades. Schwinn repurposed the Town & Country model name for their adult tricycles. Almost every Paramount tandem sold in the 1970s came with two sets of Campy Superleggera pedals! Some also had road versions of the curved Campy track skewers, before the CPSC version which appeared in 1978. For some reason, these can fetch some serious scratch on the auction market.

There are some excellent photos of a T&C at Bikeville thoughts: For Sale- Schwinn Town and Country tandem

Edit: I forgot to mention that the Paramount has a cramped stoker's compartment by modern standards, and typically has a very short stem, sticking the stoker's nose close to the captain's smelly back. I suggest putting flat bars in the back, rather than drops to put the stoker a little farther back, along with a medium-to-wide saddle.