Very cool Frame design. I have not seen another like this anywhere so I have no reference for the year, but an educated guess would lead me to say late 50's. I added the chrome fenders, truss rods, Messinger seat with crash bar, flipped the bars and added Hunt Wilde Original white grips. Wheels are Schwinn S-7 white with black pinners and Schwinn Westwind tires. I took it for a blast down the street just before it started to rain and I was impressed. No squeaks or rattles and though I am a bit big for it, it rode nice. Good gearing for inclines. Notice the funky BB and crank mounting. Never seen one quite like it before. The frame design definitely screams Board Tracker with the 'U' shape. I bet an engine would fit right in there! Enjoy!