Ship's striking

This clocks strike the ship's bell (ships clock) sequence. Ship's Bell Strike is based on "watches" onboard ship of 4 hours each. A new watch starts at noon, 4 p.m., 8 p.m., midnight, 4 a.m. and 8 a.m. The end of a "watch" and start of a new watch is marked by the bell being struck 8 times. A half hour later, the bell is struck once, with an additional strike each half hour until the end of the watch. Then the cycle starts again. The bells are struck in pairs, that is, the first two bells are struck close together followed by a delay, then the next two, etc. 
The Ship's Clock sequence counts the four-hour watches that are still common today where one on duty for the watch would expect a duration of four hours.  Each watch would begin at 12:00, 4:00 or 8, day and night. For example a watch may start at 12:00 noon, The clock will strike 4 pairs of strikes at 12:00 indicating the start of the ships watch. At 12:30 one chime plays. The bell strikes are in pairs, the clock would strike twice - pause - then add another strike. The chart below indicates each strike at every half hour.
 
             
Ship's Watch Begins
  12:30    1    X            
    1:00    2    XX            
    1:30    3    XX    X        
    2:00    4    XX    XX        
    2:30    5    XX    XX    X    
    3:00    6    XX    XX    XX    
    3:30    7    XX    XX    XX    X
    4:00    8    XX    XX    XX    XX
Ship's Watch Begins   
    4:30    1    X            
    5:00    2    XX            
    5:30    3    XX    X        
    6:00    4    XX    XX        
    6:30    5    XX    XX    X    
    7:00    6    XX    XX    XX    
    9:30    7    XX    XX    XX    X
    8:00    8    XX    XX    XX    XX
Ship's Watch Begins  
      8:30    1    X            
      9:00    2    XX            
      9:30    3    XX    X        
    10:00    4    XX    XX        
    10:30    5    XX    XX    X    
    11:00    6    XX    XX    XX    
    11:30    7    XX    XX    XX    X
    12:00    8    XX    XX    XX    XX

Needless to say the regulation of the striking is quite complicated to set up when reassembling one of these clocks.