1800s The UK’s oldest working post boxes
1600s Launch of Royal Mail’s Investigation Department
1500s Sir Brian Tuke
1800s The first postage stamp; Queen Victoria 1d black – the Penny Black (1840)
1800s Use of the Royal cypher on post boxes
1800s Postboxes: the start of the legend
1900s Intelligent letter sorting machines (ILSMs)
1800s Telegrams