This is a lovely old pair of framed engraving showing the work of a Chainetier. A worker who makes staples and all kinds of small chains. The old wooden frames measure 42 x 29cms. The engraving are marked plates II & III and have the signatures Prevost Fecit & Defehrt Fecit who were famous French engravers from c1800. It is impossible to age these engravings without removing them from the frames but they are very old (may well be original etchings) but more likely to have been taken from an old early print industrial machinery book.