Hello!

I recommend you to look this film - http://chronologia.org/filmlibrary/2012_elhov_mystification.html

It is in Russian, but it contains a lot of factual materials about the recording of dates in the 14th and 17th centuries.

As for the mentioned book, it may be a latest edition, made when a thousand have already come into use. If you have the opportunity to make a photo of the page with this date, please post it here.