First Generation Coding Desk

Accession number: OB1994.0112

This is an example of the machine that became the first generation of coding desk. This particular one was used at Romford until 1979.

After the introduction of the SPLSM in 1956 improvements were made and the two functions of the SPLSM were separated.

This machine was introduced in 1968. As with the SPLSM, letters would have been presented vertically to the operator who would key-in a code.

Instead of sorting the mail immediately into a box like the SPLSM, the machine would print a code made up of phosphor dots onto the envelope. A separate machine would then 'read' the code using UV light and then sort into the relevant box.