...
Boxes in the Mountaineers Archives should use numbers of the form yyyymmdd.xx, where yyyymmdd specifies the year, month, and day when the box was labeled. The final element, xx, is a sequence number, in case more than one box is archived on a given date. Example: 20141108.1
Box numbers aren't permanent. The can be created and destroyed as needed. The numbering system is intended to ensure that every box in the archives has a unique ID number.
...