M14 M1A USGI wood stock in birch, Springfield Armory manufactured - SA (the original one, not the commercial company that makes the M1A) was the US government armory that developed the M14 and produced the first issued M14s. They had the lowest production of any manufacturer of the rifle and ended production the earliest of any manufacturer under the M14 program. The production of the M14, coming after the M1 Garand, depleted the stock of walnut lumber in the United States. Rifle stock production shifted to birch at about the same time that Springfield Armory was reaching the end of their production run. So the short overlap makes the SA birch stock quite rare. I did a pretty complete sort of my supply of stocks in the summer of 2023, and when these go out of stock we're done.
Excellent - looks like a well maintained, issued stock. Dings, wear and scratches are light, finish is in good shape. Metal shows some wear, but not excessive. This is the grade you won't feel embarrassed to put on a newer rifle. Plan on wiping it down with some mineral spirits and think about putting on a coat of tung oil. If you're a stock refinisher, the process will be a lot faster than with a VG/VG+ as the dings and scratches will be fewer and shallower. Straight (not fancy) grain.
These stocks all have proof and inspection stamps.