I recently purchased a model 99c .308win but in spite of all my research can't seem to date it.

Serial number C615549 on the receiver. It has Series A on the barrel as well as a few other marks I cant make sense of just yet either.

the number 2 inside a box(random location)
the number 1 inside a box(random location)
83 (random location) by random I mean they are all in the same area but placed all over
what appears to be a 6SP
And a deep set capitol K

There are drilled scope mounting holes(I removed the scope as I intend to not use it for a stand gun)

The gun is nice and clean inside but the barrel and stock show wear and use marks, the fore and rear stocks are checkered nicely. It is a pistol grip stock.

I would really appreciate some one helping me find the age of this gun.

Thanks, Tommy