Beautiful job. From the looks of your 27 stock, I'm guessing mid to late 50s. I'm surprised you didn't find a date stamp on the butt in your refinishing process. Look again, it might be there. I redid my '59 27 stock with transtint dye and Royal London Oil, and I couldn't be more pleased. Mine doesn't have quite as much beech flame as yours does, but it does have some pretty neat black streaking.
As an aside, I recently redid a Slavia 620 stock (for the older gun with the round threaded endcap) and I was amazed by the amount of irridescent flame. It is without a doubt the prettiest piece of beech I've ever seen. In the sun, it flashes on and off as you move it. Unfortunately, I don't have a gun to put it on, since the donor was toast.