Large folio size at 15 inches wide, 11 inches tall! This is from the City Of Anaheim Development Services and was specifically for Industrial Development. Contains 21 color maps covering main water lines, electric power lines, gas mains, flood control, fire protection, sewer lines, & topographical soils classifications. We could not find a date on this, but all of the other city items from this collection were from the 60's and 70's. It is in great shape, just a little wear and a couple of tiny dings on the cover.