I have never seen Winchester or Western, or Winchester-Westen .45 Auto Rim ammunition. Or brass marked as such.
All I had run across in the 40 years I have been shooting is Remington-Peters/Union Metallic Cartridge, which was often the same corporate entity. The new runs of Starline brass has made the other makers able to offer .45 Auto Rim in loaded cartridges.
I have found the R-P Auto Rim brass I have loaded and shot to have been of pretty decent quality, better than the results I have gotten from similar loadings of other cartridges made during the same approximate eras. While my .45 A-R has been stellar, my R-P made .44 Special, .45 Colt, .45 ACP and .41 Magnum mid-range ammo has suffered a lot of case failures due to case body splits and splits on the mouth edges.