N = Next collection

The words NEXT COLLECTION can be found cast on many types of boxes alongside a holder for a tablet, which the postman was expected to change each collection to indicate when the box was last emptied and when the next clearance was due. It was first introduced on Type A and B pillar boxes and the large size wall boxes in 1905.
The Letter Box Study Group
2016-02-10T16:19:02+00:00
The words NEXT COLLECTION can be found cast on many types of boxes alongside a holder for a tablet, which the postman was expected to change each collection to indicate when the box was last emptied and when the next clearance was due. It was first introduced on Type A and B pillar boxes and the large size wall boxes in 1905.