A friend showed me this recently so I scanned it for display here.
If these were printed in photogravure we might suggest that these marks are a doctor-blade flaw, but this are litho, and there are several marks. It looks to me similar to the drag marks that I get on my desk-top printer when there has been a problem with printing.
I understand that the original finder has several like this and the extend over the whole A4 sheet. The colour affected is the gold, so it is from the original Walsall printing and is under the Olympic images.
Bristol undated packet cancels during WW II - During WW II a number of undated packet cancels were used - here are a couple of examples from 1942. The bottom item is an invoice for 30 ft of armoured de...