CUMMING, Alexander. The Elements of Clock and Watch-Work, Adapted to Practice. In Two Essays, London: Printed in the Author, 1766. 4 (255 x 208mm.), 16 folding engraved plates (title torn at inner margin, some heavy spotting to text, plates occasionally lightly spotted and with some offsetting), later half calf gilt. Bromley The Clockmakers' Library 218.