The date stamp and the registrar stamps are on the back.
At http://voices.washingtonpost.com/plum-line/2011/02/the_gops_post-birtherism.html it gives links to images of the front and back side of Edith Coats’ BC. Here are the links where James Coats posted images of the back and front sides of his sister Edith’s long-form:
Edith Coats Hawaii Longform 1962 #151- 62 - 08498
http://passportsusa.com/wp-content/gallery/passportusa/edith_front.jpg
http://passportsusa.com/wp-content/gallery/passportusa/edith_rear.jpg
http://passportsusa.com/?page_id=209
That copy was issued in 1984, 11 years before Johanna Ah Nee’s was supposedly issued. It doesn’t have Onaka’s signature.
Note that the items are not centered. The cross-hatch pattern appears to be authentic.
Also note that there is no bend on the sides of the Coats long-form. As of at least 1984 they had a method of providing copies of BC’s that did not involve using the bound paper copies.
The retention schedules say that the HDOH used working copies of microfilms. The BC’s were microfilmed each month - before being bound in any book - so the HDOH could send the microfilmed copies to the CDC each month. There could be a small amount of curve in the images on the microfilms because the BC’s were photographed rather than held flat as they would be in a copier. But the copies were made before binding in a book.