Ball Watch Company - A steel 'Engineer Hydrocarbon AeroGMT II' wristwatch, vintage unknown, model number DG2018C-3SC-BK, serial number 3800207, circular black dial with white Arabic numerals, hands, centre sweep, red tipped GMT indicator, date window at 3H and micro gas tubes for night illumination, tandem signed 21 jewel mechanical automatic chronometer rated ETA movement, calibre 2893-2 V8DW27 02, the crown with pivoting guard, case, 42mm diameter, red and black bidirectional rotating bezel, verso with 24 city time zone border, to a link bracelet with 3 stage deployant clasp, presented in the original case with outer card box, swing tags and instruction CD