WW2 Ministry of Information Greek motto censorship badge

A scarce original wartime oxidised silver plated badge, rose within a laurel wreath surmounted by a King's Crown with Greek motto scroll below which translates as "We Work in Silence". Believed to be worn by officers at ports employed to seek out sensitive material which would be of use to our enemies. Very good condition, complete with original pin fittings.
Height 29mm.