London SE (GB)
From Stamps of the World
The SE (South Eastern) postcode area, also known as the London SE postcode area, is the part of the London post town covering part of south-east London, England. It loosely corresponds to the London Borough of Southwark, London Borough of Lewisham and Royal Borough of Greenwich, the northern part of the London Borough of Croydon, eastern sections of the London Borough of Lambeth and northwestern parts of the London Borough of Bexley and the London Borough of Bromley.
When the London Penny Post was broken up due to an increase in volume of Post, the South Eastern District office was was established on Southwark High Street. It was opened on 24th March 1857. Initial Cancels of SE were issued numbered 1-10 and were used in the first 18 months.