I just had these FR4 boards delivered a few days ago guys and to be honenst they look like old stock perhaps to me. They have what looks like an exposed edge down one side which IMO doesn’t seem correct?  Its as if the photoresist has either not been applied evenly or perhaps the pcbs have been poorly stored or something. 
As you can see the surfaces are different colours down one edge. The pics were taken as soon as the black protective film was removed in a dark’ish room. Surely this is not correct for new PCBs? 
Many thanks for any advice.