Thomas Knifton, LondonStrapped bell and five finials over three pierced frets, the centre engraved and signed 'Thomas Knifton in Lothbury, Londini' over a silvered Roman chapter ring with stylised fleur-de-lys half hour markers and an inner quarter hour track, the centre set with a silvered Arabic alarm dial and a ring of roses, the weight driven movement apparently converted early on it's lifetime from verge and balance wheel escapement to a short bob pendulum 41cms (16ins) high.