Econet Clocks
This is the Acorn Type 2 Econet Clock in all its glory. This type of clock was introduced as an improvement on the original clock.
As such, it has two Econet sockets on the side to provide a more reliable signal throughout the network. The clock generation mechanism is improved as the Type 2 clock allows the Space to be configured as a multiple of the Mark. In the early Type 1 clock, mark and space were the same length, reducing the efficiency of the network.