Hi Martin,
Yes that is the generally held idea - the more detailed and well struck the marks the more likely to be European originals. I would have to say the marks on your sword are exceptionally well made.
One of the things I look for is if the marks are of an even depth - struck when the metal is hot. A lot of the native marks are unevenly struck due to being done "cold".
An interesting thing, is that of the triple fuller blades that appear to be European that I have seen, most have not had half moon marks at all! But rather nothing, or astral engravings (moon, stars, etc).
Here's the link to the one German sword I mentioned before.
http://www.vikingsword.com/vb/showpo...0&postcount=28