195? brooklyn Dodger autograph many questions

[dennyvr]

Hi all, new to the forum, first time poster.
My Dad as a kid got 18 dodger autographs (see pics below) I have many questions.
the autographs are in a book which is sealed by a zipper so the paper and ink are in pristine condition, also in the book are signatures from his classmates.
He got the signatures after a team function at the Hotel Brossert in Brooklyn after a team function.
1. my best guess is 1956 but the Don Elston signature leads me to 57 what do you think? Did Elston join the team late in 56 without dressing?
2. I am not concerned of the authenticity as only my Dad and myself have had this book. Should I still get it authenticated? why?
3. I do not wish to sell the book but what is the value? I feel I should have it insured. (Don Zimmer and Walt Alston are the only two that are back to back)
4. I want to be able to display the autographs but to do that I would need to cut the pages and spend some money to frame into a nice piece with artwork, what affect would this have on value?

Thanks for any input.