The 17th-century lantern clock in the possession of the Society of Antiquaries of London is shown to be one of the products of the post-Civil War boom in London domestic clockmaking. Its maker Thomas Knifton is found to be one of a close-knit group of house clockmakers working in the Parish of St. Margaret's, Lothbury. His relationship with both the Clothworkers' and the Clockmakers' Company is explored. The clock is described, its founder's marks and unique dial-plate noted. The construction of its movement and subsequent alterations are explained in simple terms. -- AATA