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Yeah that was my first thought.
I found these on velobase called Criterium, but they have only listed a few different tubulars on there.
http://velobase.com/ViewComponent.aspx?ID=0D0EC08B-269F-4FBA-BC6D-BDA500B6C082&Enum=120&AbsPos=62
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one of the comments on the velobase page says that uk distribution was by Ozzo.
BITD the only place you could get Challenge volcanos and crits etc was Ozzo - now known as inmotion.
http://www.inmotionproducts.com/shopdisplayproducts.asp?id=22&cat=Tyres
I guess I'm saying that the 2 manufacturers might be in some way linked e.g. challenge took on the criterium brand and called their produce the "challenge criterium"
Could be an old label for Challenge Criterium Open