I'm not a big fan of stag grips, but I couldn't pass up a near mint Detective Special at a gun show in Florida about ten years years ago that had very old, beautifully made and perfectly-fitted stag grips on it; even the grain pattern at the bottoms of each panel are mirror images of each other. Unfortunately, the photo makes the stocks look whiter than they are, and it's obvious in person that they are contempory to the gun.
Out of curiosity I got the pictured factory letter, which showed the usual "not listed" for the stocks. Interestingly, the gun was shipped in 1929 to John Jovino in New York, which is about 35 miles from my current home. So, I had to drive 1600 miles to a gun show to get it 70 years later.
In the photo, I've included another mint 1931 vintage Detective Special with standard stocks. Since I'm able to perform a side-by-side comparison, I definitely prefer the checkered wood in both looks and feel.
By the way, I apologize for the cable tie on the later gun; it's left over from the last gun show where I brought it in to see if I could trade it for something equally interesting. A dealer offered me $450 cash, so I figure that makes the gun worth $900.