Osborne-1 with prototype-based motherboard

I'd love to see a photo of the innards of the prototype if anyone knows where to find them. There were 10 built, and someone took a photo recently enough for it to be of decent quality (the one that appears on oldcomputers.net). Someone must have one somewhere. I think Al might be onto something with the tech manual. The question is, how did the revision scheme work? I have two Revisions noted on the board.. the 2A2011-00 Rev D (in marker), and 3A3005-00 Rev C. Looking at later boards like this one: https://www.flickr.com/photos/eevblog/31731875815/in/photostream/ ... It looks like the trailing 2 digits on the 2A2011 number changed to either 02 or 20. So is a 2A2011-00 Rev D and a 2A2011-20 Rev D the same thing? Don't' know. And then other boards used a 3Axxxx-xx number instead of the 2A2001 number. Kind of confusing. Brad -----Original Message----- From: Sam O'nella [mailto:barythrin at gmail.com] Sent: Saturday, December 29, 2018 2:48 PM To: Brad H <vintagecomputer at bettercomputing.net>; General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: Osborne-1 with prototype-based motherboard Maybe too easy but have you asked the seller if they know anything about it's origins? I'd also guess maybe an employee or it could just be one of the 6 motherboard types as someone else commented. Pretty awesome though with the low serial. Thanks also for the blog. I had no idea about the different designs and cases. I'm curious which one I have now. Sent from my Apple /////c wrote: terribly helpful.