John that is an excellent helmet! Really great piece, reminds me very much of my ET M42 named to an E. Hasenberg.. Very similair!
Thanks guys, I appreciate the positive comments. I have a particular fondness for items with at least some traceable provenance. Discovering people and hopefully some evidence of their personality or putting a face and history to an object - That's the juice for me in this hobby!
Great story. It makes the helmet doubly attractive.