 The Wells striking system uses a double lever, for example, which is more reliable than the system used in Salisbury.It can be safely assumed that the Wells clock and the Salisbury clock are roughly of the same age, as they share a lot of construction details.The assumption that both clocks were made in the 14th century is not verifiable, as only a payment to a keeper of a clock is mentioned, but no detail about the clock itself at the time is known.