A rare late 19th century ruby glass and gilt metal Art Nouveau Gilbert Clock Co. mantel clock, the unusual ball ruby glass body with gilt metal mounts highlighted with Art Nouveau scrolls and forms, the enamelled chapter ring with Arabic numerals enclosing the exposed escapement above the maker's symbol of a 'G' within a diamond, the movement engraved with maker's name and patent dates for 1896 and 1902, gong striking, mercury filled pendulum. 16.5 cm x 12.5 cm x 28 cm the circular rear hinged cover requiring attachment.