Sorry. The
convex (non-medallion) service stocks didn't start shipping until about 1920. From about 1911 to 1919, they had the recessed gold medallions. Before 1911, the stock circle was flat or concave and had no medallions.
Marcelo's do appear to be convex, so they are later than the gun. But the pics may be fooling me.
Here's a pic of the stocks that shipped from 1911-1919:
And here is the pre-1911 style (except these are square butt stocks):
Finally, the style from 1920 until about 1929 or 1930:
