The ball engineer master ii officer timepiece is relatively large and easy to read its case diameter is 46 millimetres one of the most prominent characteristics of the officer is the pocket watch movement eta 6498 which is hand wound the movement performs 18 000 vibrations per hour and has 17 bearing jewels the watch is protected from shock magnetic influences and water penetration hands and indices are illuminated through the use of 14 self powered micro gas tubes that glow 100 times