The Electone E70 model was different in that it used the same circuit boards and preset voice architecture as used on the CS80. So basically, you're getting a preset CS80. Pretty sweet...
I'm certainly glad we found it when we did; these are most likely becoming rare, and I don't think Yamaha produced a ton of them, so if one presents itself, it's best to grab it (providing you have room, have a means of hauling it, and have some friends that don't mind helping lift a 350lb organ...)
Here she is after a thorough cleaning. Unfortunately, we are still having issues with the second bank of voices, and are trying to obtain a service manual. Once we figure out the problem, we have a full-fledged analog synthesizer in a home organ enclosure. This was definitely a good find, and like all projects, extremely rewarding once done.
