Like the others wrote, Jerico... give us the rifle's serial number and, if available, its Lever Boss Code ("LBC")... and one or several of us will probably be able to give you the information you seek.
It is generally felt that the LBC is "THE" most accurate way to determine the year of manufacture of the Savage Model 99s.
However, without the LBC, determing the year of manufacture gets a bit tougher due to an inter-mingling of various series of the rifle's serial numbers in some years.
If you wish to know the rifle's value and/or model, we'll need to know its condition and features along with the LBC and serial number. Pictures always help too.
Strength & Honor...