Oldie - but a fun bike to take around a board walk...I have the three seat variant. Schwinn Town and Country...
https://philadelphia.craigslist.org/...906127751.html
Old (1940's? '50's?) Schwinn Tandem Bike. Has been restored years ago but could now use some paint restoration. It is solid, and heavy. Will get wheel size next time we get to Norristown. Haven't found serial number or frame size. Don't know what suspension or handle bars are called.