I did see these in person, the color is actually the same as mine. Looks really close to an original as I had the fortune to see one of those in person too.
However, the price just isn't right. And where is the binding on the neck?
The Historic version is $4100 while the Standard Line is $1800. I think, and only guessing here, is the 137 is limited production, so they won't mass produce them along with the standard core line. My assumption is they will only make them upon request, driving up the cost. So making them a custom core model would make sense I suppose.