Very interesting items, rarely seen in the UK. We have two of these available, both are the same in terms of condition.
They are unused report forms, used to report bomb damage, casualties, damage to services and so on. Believed American given the spelling of the word "Center". Each has several pages, with carbon paper in between, the pages being the same of course, but addressed to a different organisation, fire, gas and electric, sewage etc...
£10 each.