[PMoz99]

Brian,
My own research from some time ago also only turned up L6R L3075 and L3105, but there was no suggestion of any other codes also appearing on the a/c. There certainly weren't any aft of the roundel on the photo I have supposedly of L3105.
Where did you get the 6B from? Was there any confirmation that it was carried on the side of the a/c in question?
Peter