I figure that it's merely an awesome attempt by the engraver (Tony, engraver #7) to make
his art "
pop" ... it doesn't really look like a double-strike to me (but
curtis probably has more "likes" than I do)
I have a
hippo example where some kid tried telling me that my example was double-struck (I think I was booted-out for a time-out that night?)
... but who knows, eh? (it would be awesome if they
had the answers in the back of the book)
Here is my example of a similar design item (my
hippo has some sweet 2000 year old 3-d efforts going -on ... I love it)