The serial number is 7598. I will have to make a trip to my shop to get the top markings from the barrel and a close-up of what appears after the serial on the left side. My shop is a ways up the hill from the house and I am recovering from surgery, but I will try to huff it up there today. What makes it look like an Erfurt receiver and what about the barrel makes it look like a Nazi refurb? I have much to learn. Your expertise is appreciated. Thanks. - Lee
Here is a right side view if it helps...