See other post. AFAIK none of the Tennis came with rollers. While there was a VIN# changeover point listed somewhere I know for a fact that it's accuracy is *Rubbery* as I've had flat tappet bikes with later VIN's through my shop! Just ask the owner to take a rocker cover off and take a picture of the cambox and end of the rockers away from the valves and send it to you. The two set ups are completely different visually.
Pete