Information Sought - County ARP Reserve Special Constabulary Cap & Badge

Information is sought regarding the below badge. If you have any knowledge of where this badge was issued please let me know. The plume of feathers may be taken from the county's coat of arms / emblem. The three ostrich feather plumes emerging from a coronet is often seen associated with the Prince of Wales so possibly a Welsh connection.

County ARP Reserve Special Constabulary Badge

County ARP Reserve Special Constabulary Cap & Badge