Mine belonged to my grandmother. In it, she kept track of friends and family members' important dates, all in her careful penmanship. If I ever research my family tree, I will definitely consult this book, as she recorded many family members' names that I do not recognize, other than the last name.
I remember being awestruck by this book as a child. I had never seen anything so beautiful then, and it still is spectacular and beautiful to me today.
Below are some images of my copy. I have also included images of other versions I found on the Internet. It's lovely, isn't it? I just think it is very inspiring.


The plate for February with a relative's birthday recorded. Who might you have been Helmuth Boettcher, born in 1898?

Here are some other images.
From a listing at Ruby Lane:





And another cover version from another site:

And another version from a German bookseller: