City Navigator was locked when I bought my 60cx ~15 years ago. It is not inconceivable to me that one could copy .img files of nonlocked maps like Topos from one device to another. But I have never tried it. Back when I had the 60 I was always having to create .img files with different sets of map tiles for different rides due to the limited amount of map memory available. So copying and existing .img file would probably not have been that useful.