There is a photograph floating around in the WWW somewhere which shows Baden's launch ceremony; don't ask me where, I only saw it, but never downloaded it. That one shows the bow crest attached, although it was apparently removed soon after launch. So I think there's no problem putting the large crest on the picture, I'm sure they stored it somewhere to be re-attached after the war. I would not put it on the actual ship, though, because I have not seen any photograph that shows Baden with bow crest.
Thank you for the praise Novice, and thank you for the photo, I do have that one, although I have it saved as Baden's launch, I believe it to be either Sachen or Wurttemberg due to the lack of any ceremony during the launch.
Regards
Tempest.