This popped up on ebay a few years ago. It purported to be a Boeing design for an advanced subsonic stealth bomber… but the design is, clearly, rather silly. Supposedly it dates from 1984 and was produced at, by and for Boeing, intended to be a decoy for the B-2 Advanced Technology (Stealth) Bomber competitors. I’m not sure Lockheed or Northrop would have looked at this and seen a serious design, however.
*Some* aspects of it seem like they might have been taken from an actual stealthy bomber design… the inlets and exhaust, indeed much of the middle part of the wing/body, look about right. But the stubby wing and especially the straight-vertical fins in substantial numbers are goofy aerodynamics and spectacular corner reflectors.
At least two of these were made and wandered out into the wild over the years.