The stamp is the LBC (Lever Boss Code), which was appied when the rifle was made to show when it was made - but the focus on you pic is such that I cannot make it out (but looks like it might be an "H").
"A"=1949, "B"=1950, "C"=1951, "D"=1952, "E"=1953, "F"=1954, "G"=1955, "H"=1956, "J"=1957.
The transition from the lever safety to the tang safety started gradually in the late 1950's.
The model should be stamped into the front receiver wall, viewable after removing the forend wood.
Single-letter models (like "F") were stamped on only one side of the rotary magazine's axle housing; Two-letter models (like "EG") were stamped with one letter on each side of the housing.
The scope mounting holes are factory, because IIRC on guns prior to factory scope prep, the Savage logo was atop the front ring & only moved to the LH side due to the prep - aftermarket D/T'd earlier guns have the hole drilled through the top-stamped logo.
I'd want to insure that rifle for $1800 replacement value, minimum.
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