Aren't the Marlin 60 rifles marked Marlin 60? I saw a rifle that was marked Glenfield Model 60 by Marlin Firearms Co. Looked just like a Marlin 60. I don't find much on line about Glenfield. So, when and what years did Marlin mark the 60 that way? Is it a different (maybe cheaper) version of the Marlin 60, just sold under the Glenfield name?