Holt currently has 20 mapped postboxes recorded by The Postbox Hunter. The postboxes in Holt include 4 recorded royal cyphers. The most common is EIIR, recorded on 11 postboxes, representing 55% of the mapped total. Other recorded cyphers include EVIIR, GR and VR. 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 Lamp, with 8 mapped examples. The data contains 3 different recorded postbox types. Across the available tagging data, 3 designs are represented. This information is generated from the latest postbox location and tagging data available to The Postbox Hunter.