Originally Posted by T-Mar

Sounds like it was equipped with Bridgestone Synchro Memory Shift (aka SMS), a proprietary repsonse to Shimano's Positron indexed system. If you thought Positron had poor market receptance, SMS's was even worse. Even funkier, both shift levers were mounted piggyback on top of each other, on the right hand side of the frame. The only models that I recall seeing it on were entry level with hi-tensile frames, possibly a Skyway or Super Speed.