1847 Franklin Institute Second Premium Award Medal. Bronze. 51.3 mm. By Christian Gobrecht. Julian AM-18, Greenslet GM-94, Harkness PA-50. Mint State.Reverse engraved HENRY L. NOLEN / PHILADA. PA. / FOR / SLIDES FOR MAGIC LANTERNS / 1847. Reflective dark chocolate patina displaying a bit of golden iridescence on the reverse. Old collection number inked on edge.