The Westfield, Mass. barrel stamp makes it 1960 or newer as that's when Savage moved their factory from Chicoppee Falls to Westfield. Lack of a letter prefix also tells me it was made before Nov. 1, 1968 when the Gun Control Act of 1968 went into effect as that's when Savage started using the letter prefix to differentiate between those guns made before and after the law went into effect.