Not yet - the index person completing the card records didn't always record the preamp card numbers, and I haven't found that number recorded.
Next step will be to pull actual files created from index cards and see if any that match the spec list have photos or any notation that can help. I'll warn you that this is a long process, and lots of sorting. Also, while I have stuff like that pulled, I tend to work it in my (infant) database so it takes longer to find the details but I get a two-fer while I'm handling the file.
It's on the radar, and I will update as soon as I know something else. At least we can be reasonably sure your guitar is likely from 1976 at this point.
