Here's an unusual one... this Butterfly Bomb warning leaflet has been doing the rounds for several decades. I bought mine in Rochester in 1990. However, for a wartime leaflet, it has one or two puzzling features.

For a start, it is not printed on standard thin wartime economy plain paper but thicker yellow paper. Secondly, it has thick blue, almost raised print. I suppose it could have been printed like this to draw immediate attention to the leaflet, as the SD2 was a nasty little bastard.

Also, all the examples seen are in mint condition. The design and font look wartime, so if it is a fake, it could be based on a wartime leaflet but repro-ed in colour - however, no known example in plain wartime paper and simple black ink seems to have surfaced over the years.

Any thoughts?