I have a 12 bore Premier Grade from the same era and it has a similar pistol grip with an engraved metal grip cap. The wood looks like the typical high grade wood that Scott put on their medium and high grade guns. Oval locations varied up and down the stocks. Looks original to me....
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You know your old,when a well-shaped sidelever quickens your pulse

Better to keep your mouth shut and be thought stupid,than open it and confirm.