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@SnoopJ

I first found out about this device as it plays a big role in William Gibson's spy novel. I am mad at him for probably driving up the price such that I'll never be able to own one.

@futurebird @SnoopJ
The main thing that drove up the price was the Scientific American article, not the WG novel.

I have a Type I, but shortly after I got it, the add/subtract slider failed, and now it only subtracts regardless of the slider position. I hope to get it repaired someday.