Keynsham 'Wessex' cancel

Before the issue of barred numeral cancels, approximately 40 towns in south-west England used their circular date stamps for cancelling adhesive stamps rather than Maltese Cross cancels, the majority known being used during 1842. These are commonly referred to as the “Wessex” cancellations because of the region from which most of them originate.

Here is an example of one, possibly inadvertant,  from Keynsham in November 1841.