The Amiga Walker was a prototype Amiga computer that never made it to market. Wikipedia has some info including a photo of a motherboard.
How advanced was the prototype? Could it boot and run Amiga software, for example? Are the custom chips existing versions from older Amigas, or new revisions that would necessarily be engineering samples? Were any parts missing or non-functional?
I'm asking how close it is to being a completed product that could have been put into production, or even manufactured today were the CAD files made available.
Some additional information found here, note that the prototype apparently had performance below that of a basic A1200 due to some issues with it.