Rare piece of early computing. This one seems to have 2 different model numbers printed on it. I have 4 other more of these with some slightly different model and serial numbers or no model number at all, so please let me know if you’re interested. I came across a huge supply of these years ago and these are my last 5. Once they’re gone, they’re gone, and I don’t know how many more opportunities there will be to buy them.