[Printed trade card] / Tyzack, Dobinson & Co., Manufacturers of Chain Cables, Anchors ..., Tyne Chain Works, Low Lights, North Shields. [ca.1830. Bears image of proving machine. Verso bears 'Table of Chain Substitutes for Rope Cables ... the result of a variety of experiments by which the proper working Strength of Iron and Hemp has been accurately ascertained'. Part A 1516/11 of the Goodrich archive]