early M1 rifle stock rebuild

[mannparks]

This SA SPG stock was from the early 1940 time period when the P proof stamp was changed from the non serified P to the common WW2 serified P poof stamp in a circle. The drawing number was also discontinued too. The second P proof stamp is the non serified type used on
rebuilds. Note the toe of the stock with the small gap between the wood and the buttplate, later buttplate conversions were improved. Besides the additional P proof their is an absence of any rebuild stamps, only the faint SA SPG cartouche remains.

robert, what is the importance of or lack of, the gap at the toe?
is this what is termed the [birdsbeek] ?---charles