CUMMING, Alexander. The Elements of Clock and Watch-work, adapted to practice, London, for the Author, sold by him and A. Millar [etc.], 1766, 4°, FIRST EDITION, 16 folding engraved plates (title soiled and slightly tattered at margins and with Smithsonian stamp on verso, withdrawal stamp at foot of B1v, 2C4 holed at upper margin), contemporary calf (rebacked, spine with library label).