You have a Marlin Model 49 .22 Autoloading Rifle. Yours was Made in 1969 and originally sold for $59.95. 2 piece stock which is unusual for an autoloading Marlin .22. These were also the first unique model produced for a mass merchandiser, so created for western automotive then added to Marlins catalog later. They were produced for 10 years from 1968-1978. Production numbers total 110,422 with 79,458 Model 49's and 30,964 model 49DL's made over that period.
I would love to see a picture of the rifle if you have the ability. The 2 piece stock IMO keeps with a more traditional Marlin look. Congratulation on your new rifle! Hope this helped.