there are 25 audio watermarks for this release.
these might be connected to a specific person, so there might just be 25 watermarked copies.
could be way more though, with just the number indicating the version of watermark used or not even having a meaning…
there might be a watermark, there might be numerous, there might not even be one on the actual disc; it’s more like making sure the recipient gets the idea the material has been tempered with so he/she doesn’t disclose it. if the watermark is really there you can’t teel from just looking at it (or in most case just playing the record).