A pair of non-relieved stocks made of Goncalo alves from the early 70s (only pair I have ever seen or heard of) and a pair of coke bottle stocks without the relieved area (also Goncalo alves) from 1955.
On the major auction sites (where prices can go 10-50% more than folks in this forum would consider reasonable), people will pay a heavy premium for diamond N-frame stocks, over just the standard targets (typically $140-250). If you can get a set as nice as the ones in these pics for $100 - GRAB THEM!
Exceptions aside, then what Jerry was trying to point out to me was that the early 50's non-relieved diamond targets were not made of GA, but rather what looks like Walnut? Sorry for the ignorance. So apparently Goncalo Alves wasn't used by Smith for grips prior to when, 1955/56?
All of the checked target stocks that date to the mid-50s or a little earlier are made of walnut (one exception, above). These stocks do not have the relieved area on the left panel. Plain (unchecked) target stocks of the same vintage are usually made of rosewood or Goncalo alves. Why S&W did not make checked target stocks during this period from rosewood or Goncalo alves is anybody's guess, but I suspect it was related to cost and the fact they used this wood for plain fancy stocks to be used on special guns.
Here are the N diamonds I have available...pretty certain they're walnut and not in the mint category of the others shown here...but not $350 either...I have them on the classifieds at $225 with 200+ looks and no takers...I'll go down to $200 before I take them to eBay...