Frederick Andrew Bradford was an electrical mechanic by trade. This is his personal record card with the Permanent Forces (Form A97). He enlisted on 16 February 1929. Service cards like this one include some personal information and details of service.
More information about this record is available in the National Archives RecordSearch database. The link below takes you into the database.
NAA: B4717, Bradford/Frederick Andrew
Where you see this symbol in RecordSearch, a digital copy of the item can be viewed online. Simply click on the 'View digital copy' link.