Oh nice work boys re the VS and putting it the right way up
RYFQB I think you were right that there is one further line, partly visible on the original image at least. It appears to be the same distance apart again as the other two are from each other.
I cannot find an image of the internal structure of the VS that shows anything at this particular angle though.
If it was an external object which caused what appears to be paint loss along these lines, I can't for the life of me think what it can have been.