Well if it's a 7, it would indicate Paul Meybauer as the maker. Now, was this old stock, because it looks like a period piece as opposed to a TR era made piece. Maybe the Meybauer firm had old stock left over and stamped thier official number on it after 1939 or whenever they brought in the number system. Meybauer did make crosses during both world wars, but as far as I know, no one has identified or come up with a Meybauer marked EK2. I have always wondered about this as they made many EK1's and both classes in WW2. Of course, this all depends on it being a 7 and not something else. It could still be a letter, poorly struck and hard to read like so many from this era. The ribbon looks like it came right out of the WW1 era.