Generally speaking the PARKER BROS. OVERLOAD PROVED stamp began appearing during 1926 in the 216xxx serial number range.
216741 02 PARKER BROS. OVERLOAD PROVED.jpg
If your 1905 vintage gun has such a stamp it may well indicate it was rebarreled between 1926 and the Remington take over. Does your rib legend have MERIDEN, CONN. or MERIDEN, CT, U.S.A.?