SMC Screw on NHC Elevation Knob

I read an article in GCA about SMC screw on NHC elevation knob. Anyone recall which issue the article is in? If I recall they were in limited use on early post war SA rifles.
Thanks

Don'r recall, we publish lots of scholarly research articles. Here's part of a much larger table from an article in 2010:

Serial Number Elevation Pinion Windage Knob
5314261 Yes NHC Weatherhead
5315495 Yes NHC Weatherhead
5403200 No NHC DRC
5436951 Yes DRC DRC
5437937 No HRA DRC
5437999 Yes HRA DRC
5438773 No HRA DRC
5440014 No HRA DRC
5440829 No NHC IHC/DRC
5441006 No HRA DRC
5441503 No NHC IHC/DRC
5441965 No NHC IHC/DRC
5442364 No NHC IHC/DRC
5442903 No NHC IHC/DRC
5443286 No NHC IHC/DRC
5443468 No NHC IHC/DRC
5445645 No DRC IHC/DRC
5445894 No NHC IHC/DRC
5446147 Yes NHC IHC/DRC
5448729 No NHC DRC
5448914 No DRC IHC/DRC
5449037 No NHC IHC/DRC
5449666 No NHC DRC
5450420 Yes DRC DRC
5450932 No NHC IHC/DRC
5453019 No LUX Weatherhead
5464096 No NHC Weatherhead
5473439 No IHC Weatherhead DRC
5474805 No NHC DRC
5478242 Yes NHC DRC
5483654 No NHC DRC
5484040 Yes NHC DRC
5487328 No NHC DRC

If you google the knob, there is a chart in one of the CMP posts that keeps popping up that provides the makers and when they are used. I don’t know how definitive or who compiled the chart but it indicates that it’s early post war. I don’t know if it’s accurate but it’s a reference point for at least debate. I don’t recall what issue it’s in I believe you can google the index of articles or download it from the GCa page and then based upon when you read the article you should be able to narrow down the timeframe. Good luck.

Thanks for the info. I've looked thru GCA index but can't find it. Maybe I read it somewhere else. From what I remember article was about JLG SA rifles said it was used intermittently on early post war SA rifles. Should have made a copy when I first read it, guess I figured I'd remember where I read it. Lol.