No need to stick with your copy except for sentimental reasons. Second-hand copies are dirt cheap. I’ve five different editions in the library, none of which cost me more than a few pounds. The first (1910) edition was was given to me by a friend whose astronomer father had died recently. It’s been well-used for the last century and ought to be re-bound professionally.
If you wish I can put you in contact with a guy who is down-sizing his library and from whom I bought the Tycho catalogue. He had a copy of Hans Vehrenberg’s “Photographischer Stern-Atlas” which goes down to mag 14 or so. Don’t know whether it is still for sale.