Offered here is a RARE vintage motherboard and hard drive option to add to an Osborne Executive computer. This is a very rare option and I have never seen another. It was issued for the Osborne line of computers by Nevo Electroncs in 1985. Very few were sold.. I could not find any info on the web but I did find a photo of it installed. Last photo shows how it mounts into an Osborne Executive. It is untested but I see no obvious damage. Its been on a shelf here for many years. I believe it worked when pulled but no Guaranteesnow. Seems to include all connecting cables and mounting hardware. These accessories are difficult to find FOR A LONG OBSOLETE CP/M computer. Condition is excellent but untested as I no longer have a fully functional Executive. Sold "as is" Parts or repair as I do not warrant 40 year old electronics. I ship worldwide. Please check out my other listings. Buyer pays shipping. Good Luck!