"If anyone can confirm this is the EKI and where we might look to find out details of when and how he received this award, any ideas, suggestions, etc. would be most welcome. What sort of documentation/paper trail would accompany an award like this? I also want to confirm he would have been awarded the EKII before being awarded the EKI. "
Hello Daniel;
Great link and story on an interesting player in the spy game during WWI. I enjoyed learning about his activities and what he was attempting to do.
To address your initial question again....Yes, this is the EK1. There is no doubt. From what I can understand from the synopsis/chronology of Hans Boehm, he earned his EK1 for his spy related efforts. His military service was long finished before WWI. No doubt the Imp. German government found his service valuable (and dangerous) and rewarded him with it (perhaps after the war). The EK2 is implied with the awarding of the EK1. In the formal, civilian photo that shows him wearing the EK1 and the Spanish award (Order of Military Merit? -Breast Star) he doesn't bother with the lesser EK2 award.
The best way to learn when he earned an award would be to have the award document for the said award. They are typically dated. As I mentioned earlier, it is my opinion, based on the chronology that I read, that he earned he EK1 (and EK2) after the war for his (spy) services on behalf of Germany. Likely the Spanish award was also awarded after the war for the same reasons.