I was looking at the Norman's Rare Guitars web site, when I came across this: https://www.normansrareguitars.com/martin-d-28-with-bigsby-headstock.html
As described, it's a Martin D-28 with a Bigsby headstock. Not being inclined to splash almost $3,000, I don't have the heart to place the "WTF?" call to Norman, so I'll probably never know the how or why's of this one.

As described, it's a Martin D-28 with a Bigsby headstock. Not being inclined to splash almost $3,000, I don't have the heart to place the "WTF?" call to Norman, so I'll probably never know the how or why's of this one.
