Plain or fancy, ya can't beat the Marlin 30-30! Please forgive me Mr. Winchester, your rifle will always have a special place in my heart, but I like the Marlin levers better!
If you take the first two numbers of the serial number and subtract it from 100 you will find what year it was made. ie: 21 as the first two numbers means it is a 79 manufacture.
"As senior rooster ’round here, it’s my duty, and my pleasure, to instruct junior roosters in the ancient art of roostery” Foghorn Leghorn