When I saw the auction that Mr. Moon posted, I asked the seller for more pictures.
These were then added to the auction.
I had a look at them, and came to the conclusion that this was a standard fullered variation.
Assuming that the bayonet from this topic is the same of the auction, I'm not so sure anymore, but please consider that I (unfortunately) do NOT have a shallow fuller to compare directly.
Have a look at the following topics
http://www.quarterbore.net/forums/showthread.php?t=5555
http://www.quarterbore.net/forums/showthread.php?t=1928
My personal rule here is, looking at the pictures, to look at the "space" between the fuller and the "profile" in the middle of the blade (sorry, don't know the correct english word for it).
I'm borrowing the image from this topic to explain this
Definately worth to wait for the opinion from someone more expert than me.