As PeteM observed, it has a Fyrberg plate. In 1904, Richard Sears bought Andrew Fyrberg & Sons. A.J. Aubrey was named General Manager, and in January of 1905 Sears moved the machinists and machinery to the vacant Malleable Iron Co. building on North Colony St. in Meriden. Aubrey became Vice President and General Manager for the Sears, Roebuck & Company's firearms operation in Meriden and 8 patents were eventually assigned to him.
The Model 34 in the 1908 Sears catalog
PeteM might be able to give the DOM, but it's possible very early guns did not have the Aubrey buttplate
May I add some of your images with an attribution here?
http://www.picturetrail.com/sfx/album/view/17474742 ANY 100 year old gun deserves a check and clean by a double gun specialist. You are near Champlin Arms in
Enid
http://www.champlinarms.com/Default.aspx?tabid=28 
