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Bruce's article in the July/Aug NAWCC Bulletin
https://vintagegruen.org/vgforum/index.phpindex.php?t=rview&goto=1183&th=290#msg_1183
The article is here - http://nawcc.org/images/stories/2010/articles/2013/404/404_4 23_426.pdf and is available for NAWCC members. If you are not a member, I'll gladly share a copy of the article privately with you or you should feel free to PM Bruce.
Also in the same issue, Bruce has a blurb in the "Fantastic Finds" column. This details a great purchase that although it came with a nice Gruen movement, the "find" is another watch brand.