Here is the Shelhamer collection showing the little washer that all of the rifles I have seen have used.
And a close up.
And the horn grip cap that most of his rifles have.
The 2 rifles in the original post are not marked in any way. The two rifles immediately above with the chin strap are both post-war guns and have the T. SHELHAMER stamp under the buttplate as well as a number. The other 2 are Niedner era guns and do not have the stamp. The mauser has a Niedner barrel and is so marked, and the single shot is not marked and has been rebarreled. The far right rifle is a very late gun, stocked in 1964, and likely one of his last stocks. The checkering is very fine, and was done with an electric checkering tool. It is also not up to the quality of the other rifles in my opinion.
Regards,
John
