Series X, No. 500538 15-jewel J-size elaborately damascened nickel ¾ plate movement, jewels in raised gold settings, straight line lever with moustache counterpoise, bimetallic balance, blued flat spring, micrometer regulator, stem wound and set, gold cuvette, signed white enamel dial, minute ring enclosing roman chapters, subsidiary seconds, blued hands, monogramed E. H. & Co. case with chased band