Just received this note:
I'd also like to recommend the following book related to American web gear. I do Vietnam living history displays . . . and this book has been invaluable in both ventures: American Web Equipment, 1910-1967, by Martin J. Brayley, published by Crowood Press c.2006. The text is very informative about every version of US web gear, all it's parts and accessories, and there are MANY pictures, all large and hi-res. Worth every penny. A picture of the cover is attached.
Many thanks for your extensive effort on Gunwalker as well. Keep up the good fight, we appreciate it!