Roland CompuRhythm CR-78 w/ WS-1 Writing Switch
You're looking at a mint condition Roland CompuRhythm CR-78 w/ WS-1 Writing Switch. Both the CR-78 and WS-1 come with the box. The WS-1 also has the manual.
If you're checking out this listing you know this is a quintessential piece of 80's gear. It's not often both the CR-78 and WS-1 are offered together so grab this before it's gone.
Based on the serial number the CR-78 was manufactured in 1980.