Hi all. I recently purchased a 99E (in .308 Win) in good condition from a long-time friend that had belonged to his uncle. From posts on this forum I have determined it to be of 1965 vintage, plain stock, and sans round counter. A question I do have about it under the model designation on the receiver boss is the letter "C". What does this designate?

My only other Savage is a 1st generation Axis (also in .308 Win.) in which I installed a Timney trigger. This is my primary hunting rifle.