Hi Peter,
Having collected German orders for some 45 years, I can honestly say that engraved EK1's are a veritable minefield. I have only two in my collection right now, and I've only ever owned one to an aviator that was absolutely correct. I don't like the style of engraving of your cross, period engraving was usually in a cursive script. And no self-respecting German would leave an Umlaut out, just wasn't done. In addition, I'm always very suspicious of crosses or aviator badges engraved with the names of famous pilots, as they are invariably fake. I think the cross itself is a good piece from Godet with spurious engraving to enhance value.