The year of casting first appeared on the large and small First National Standard boxes. The year is cast after the Cochrane & Co maker’s name—and dates from 1859 to 1866 can be found. The next boxes with a date were Type A pillar boxes cast by the Hillsyde Foundry, which can be found dated 1991 to 1995, except 1994. Machan Engineering’s Type C boxes have been year-dated from 1993 onwards.