EMS Vocoder 1000

Title link takes you to shots pulled via this auction.

According to the auction this is serial number 1. Some Details: "The Vocoder 1000 is a 16 band model and has great intelligibility, along with a lot of cool features like adjustable and VC slew rate/shape with freeze input, pause stuffing from either input with adjustable release time, built-in oscillator, etc. In short, this is a serious big-league vocoder... not quite a Sennheiser, big Synton or EMS 5000, but definitely far beyond the Roland/Korg/MAM league.

Before listing, I did a few Google searches on this model and there's not a lot of information other than Jarre using one in 1978. The owner's manual is dated at 1984 and has a picture of an older 1000 with a disclaimer that "the photo of the Vocoder 1000 on the following page differs slightly from the unit which you have, although the two units are electronically identical." It goes on to describe the differences (added features, better HF response, jacks in different places) and then goes on to say "FOR VOCODER 2000, PLEASE READ VOCODER 1000" and then the rest of the manual refers to it as the Vocoder 2000. So my theory is that the 1000 was originally released in 1978, there was a second revision (of which this is serial #1) was released in 1984 after Robin Wood took over, and the Vocoder 1000 and 2000 are the same with minor panel differences (and added stuff on the 1000 Rev 2). Please note that I'm just guessing here, but all the info I can find seems to back that up. I can find nowhere that authoritatively discusses the differences between the 1000 and 2000 (except for a post by myself on a mailing list archive, so hardly authoritative) and the manual refers to them interchangably."

If you know more, feel free to comment.