I'm indebted to Austin Ruddy via a FB forum for the information needed to spot a reproduction vs. the real wartime example of the iconic "Britain Shall Not Burn" poster. A number of sellers on eBay believe they have the genuine poster when in fact they have (often framed) versions of a facsimile produced by Marshall Cavendish. Between 1976 and 1978 "The War Papers" was published in 90 weekly parts and included reprints of 155 wartime newspapers plus 36 posters and two publisher's supplements.
To spot the Marshall Cavendish poster look for the poster to be printed on light newspaper stock, have a very wide border all around and have washed out colours, especially on the blues. Another key giveaway is size; originals were 20" by 30" and the reproductions are much, much smaller. The reproductions will also have a crease one running horizontal mid-centre as the poster was folded in the newspaper it came with.
Original posters were litho printed which creates a solid colour on the finished poster. Under magnification the reproductions will show the small dots of colour used in their printing. Some of the reproductions have been pasted to board, aged in some way (edges creased/missing, marks to poster) and framed to try and add a touch of authenticity. Originals go for over £500.
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