Hi Richard,
Ahhhh, you may well be right.
Now that I think about it some more, there'd be no point in the Patent info appearing on what is otherwise merey a factory accessory 'Shim', when the Patent was about the out-hanging 'adaptor' element support.
I thought I remembered seeing 'shims' or Stock-Spacers dating to the earier 1900s, and, possily these were aftermarket items afterall...unless S & W did happen to offer them.
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