A steel box houses a #2 secondary movement with an 8 cm diameter dial with arabic numerals and marked SYNCHRONOME and MADE IN ENGLAND.
Inside the box, the movement, which has Fahnstock connectors and a carbon composition suppression resistor, has a Paxolin plate mounted to the crossbar, carrying a pair of switch contacts. A Paxolin wheel mounted on an extended minute arbor has a small notch, a few minutes long, that allows the switch to close. The switched contacts are connected to a terminal block marked "C". The movement drive is connected to terminals marked "M".
On the back of the box is written No.2, 3? to 51/2 Past (painted over), on hour to 2' PAST