1. Material and manufacturing technology: The material and manufacturing technology of camphor wood boxes in different ages may be different. Early camphor wood boxes may be made of coarse wood, and later camphor wood boxes may be made of more delicate wood. In addition, the early camphor box may be made by hand, while the later camphor box may be made by machine.
2. Carving of the box: Carving of the camphor box can also provide some clues about the age. For example, if there are exquisite and vivid carvings on the camphor box, it may be an old box.
According to the above clues, we can preliminarily judge the approximate age of the old camphor box. Of course, the final judgment needs to be combined with other characteristics of the camphor box and professional appraisal opinions.