Harrow currently has 196 mapped postboxes recorded by The Postbox Hunter. The postboxes in Harrow include 7 recorded royal cyphers. The most common is GR, recorded on 82 postboxes, representing 41.8% of the mapped total. The complete recorded cypher list is: GR (82), EIIR (38), EVIIR (9), GVIR (9), crown (2), VR (2) and EVIIIR (1). Among the recognised royal cyphers in the data, VR is the earliest recorded and EIIR is the most recent. The most commonly recorded postbox type is Pillar, with 90 mapped examples. The data contains 4 different recorded postbox types. Across the available tagging data, 7 designs are represented. This information is generated from the latest postbox location and tagging data available to The Postbox Hunter.