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Post Office Investigation Department badge (20th century)

The Post Office Investigation Department (later renamed Post Office Security and Investigation Services, then Royal Mail Security) traces its origins back at least as far as 1683, developing over time as a separate entity to the police to investigate and prosecute postal crime, in particular theft from the mail.

This blue and grey oval badge with a crown situated on top was manufactured by Thomas Factoring, Regent Street, Birmingham. In the centre on a blue background is a stylised castle turret within red, silver and blue concentric lines. Around the edge is a Latin motto which translates to ‘gentle in manner, resolute in deed.’

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