That's a chord organ for playing on your lap or on a table. They were pretty popular in the 60s. It is sort of like a horizontal accordion but a lot easier to play. If you could play a tune with your right hand, and were not tone deaf, you could figure the rest out with practice. Magnus was a major producer of those at the time. Searching Franklin is hard because of Ben and Aretha. I tired putting it in quotes on Google but I still get a ton of irrelevant info from the music industry and churches that have an organist or pastor named Franklin