Remington 760 manufacture date?????

Hi gun experts. I have a Rem 760 .270, and I'm trying to determine how old it is. I've checked the Remington website and looked at the letter charts, but they don't seem to match my rifle. My camera won't take decent pictures, so I drew exactly what I see. Any ideas?

Yep, that makes sense - I found a diagram that listed out what the various markings mean. Thanks for your help.

http://www.gun-data.com/remington_mod_model760.htm Im no expert.... The EV that you find on your gun would tell me that it was made in OCT of 1979. Hope this helps.

http://www.remington.com/products/archived/centerfire/pump-action/model-760-gamemaster.aspx This will get you close if you find the SN on the gun.