maggot: I believe that is a Marlin manufactured rifle. Marlin did that for a number of firms (large hardware store chains and the like) and sold them under the firm name, not it's own. It is a Marlin by another name. The serial number is where you have located it. A five digit number is accurate. If it was a Marlin Model 339 sold under the Marlin name the serial number would probably be longer but I would not doubt the veracity of the 5 digit number. Hay, if the price is right, get it. Good luck. Mikey.