拍品专文
Full details of this device are given in Evans, Ornamental Turning, Chapter IV.
细节
A T.I.Ashton's Automatic Indexing Device,
signed Holtzapffel & Co., London, with three notched division plates, backplate with screws and operating lever, in teak case
signed Holtzapffel & Co., London, with three notched division plates, backplate with screws and operating lever, in teak case