I posted a picture today. Not in this post box because it didn't fit! I had to go the sorting office to find an A4 opening. Also note the initials 'GR' meaning this was installed in King George's reign.
Ps. if you don't follow me on twitter yet, you should! Because the 200th follower wins a print of the days digital painting that they followed. Make sense? My Twitter name is @DanYoungDaily see you there