A friend of mine decided to get rid of a few guns for some extra cash and I offered $250 for this Marlin 336 lever gun in 30-30. He allowed me to take the rifle out before I bought it and I am very pleased. It's an older rifle but in good condition. Action is smooth and stock has some dings but nothing major, bluing looks to be about 75%. I like the deal but would really like to know more about the rifle. It appears to be about a 1960 or 1970's model but I don't know for sure and neither does my friend. It has only one serial # stamped on the tang behind the hammer and came with an equally aged Tasco 3-9x40mm scope which has surprisingly good glass and clarity. How would I find out more about this rifle, i.e. actual production date and an approximate value?