Thanks dArtagnan! I have been waiting for you to find this post. Appreciate the great research. I will pull down and snap the primers on a couple of the bottom headstamps and mail them to you for your magic!
Ammogun, I’m confident this is S&B made. In 2003 I was given a case with this headstamp along with a 30 Mauser case and one other, all with this headstamp style by a senior guy at S&B who told me they were supplying the cases to Hornady, and would load some Hornady ammunition for sale in Europe! Still it is nice to have the confirmation from dArtagnan.
Just picked up five boxes of Zombie, and There were three different headstamps, one that I had not seen before. All the headstamps in a single box were the same, but the variation is between boxes. The new headstamp is below. Could it be a Speer product? Doesn’t really look like it to me. The pointed bottoms on the “mm” looks familiar but my fading gray matter can’t call up where I have seen that before.
The other two headstamps were top middle and bottom right in the original photo. That means that all three cases were being used in the first half of 2012.
Thanks everyone for the comments.