W = Wall boxes

Wall boxes were introduced in 1857. Pillar boxes (introduced in 1852) had proved to be reliable and popular, everyone wanted their own local post box, but pillar boxes were expensive to produce. For other than city and town locations a cheaper way of providing remote collection facilities was needed and the obvious answer lay in providing a cast iron box that could be installed into an existing wall where such a location conveniently existed.
The Letter Box Study Group
2016-02-10T16:12:45+00:00
Wall boxes were introduced in 1857. Pillar boxes (introduced in 1852) had proved to be reliable and popular, everyone wanted their own local post box, but pillar boxes were expensive to produce. For other than city and town locations a cheaper way of providing remote collection facilities was needed and the obvious answer lay in providing a cast iron box that could be installed into an existing wall where such a location conveniently existed.