It is from 1963, and has 7 pages, each with a different Hilda scene. From what I could see from what has been listed online lately, they are a little hard to find complete like this - they were often taken apart.
As with any holy grail score I had to fight with myself about whether to keep it or to sell it... This time my practical side won out, and it is currently listed at auction on eBay.
If you haven't seen Hilda before, be sure to run on over to ToilGirls.com and check out not only some history and a gallery of Hilda art, but also an interview with Duane Bryers, her creator. Thank you Mr. Bryers for giving us Hilda - she rocks!!