1855 Maryland Institute for the Promotion of the Mechanic Arts Award Medal. Harkness Md-20, Julian AM-31. Silver. About Uncirculated, Damaged.51 mm. 71.0 grams, .999 fine, 2.28 troy ounces ASW. Central reverse inscribed to the recipient ADAM WORLEY / FOR STEWARTS / COOKING STOVE. / 1855.