HP 71B funky serial number

[polbit]

(09-27-2016 02:03 AM)rprosperi Wrote:  Your understanding is correct, and it's relatively certain it's not from the future... It's impossible to be sure, but I would guess that it was some form of internal use device; other 9999A devices have been reported in the past. It may not be a prototype in the sense of being one of the first units, but simply used for some internal purpose (e.g. testing or the customer support team) and probably was marked this way to show it was never sold. Just guesswork though, no inside info here.

Thanks Bob, that makes sense. It's also missing the FCC sticker, and has few 4K modules with no stickers. Oh well, my first 1BBBB regardless