Here is a neat rifle I picked up a few years ago. It's a Winchester m54 with an A.O. Niedner barrel.
The Winchester dates to 1926 and the Niedner barrel to 1927. The marking on the barrel is A.O. Niedner over Dawogiac MICH. The barrel isn't marked for caliber, so I had my gunsmith do a chamber cast. The gun is in 30-06. I hope to hunt with it this season.