I was sent a scan of an underprint found on a handful of 1/2d vermilion and 1d lilac stamps. Has anybody seen anything like this before and if so any clues to the origin?
![Image](http://i755.photobucket.com/albums/xx198/andydonaldson/WavyUnderprint.jpg)
Not seen an example in the flesh yet but from the high res scan they don't appear to be modern ink-jet fakes (as no speckling around the lines).
Thanks,