SEIKO Cal. H023 (e.g., SNJ009) cheatsheet
[8] Mode: Time, World time, Chronograph, Alarm
== Time mode ==================================
[10 Hold] Set time&date  [2] Chime, key sound
[2] Select                   on(0)/off
    - city               
    - second             
    - minute                          
    - hour                              
    - day                  
    - month                              
    - year                  
    - 12/24                                
    - analog second        
    - analog hour&minute       
    - show digital time  
      (not immediately)  
[4] Adjust, also [8] CCW       
[10] Return              [4 Hold] DST on(*)/off
== World time mode ============================
[10 Hold] Use this TZ    [2] Change city
                         [4 Hold] DST on(*)/off
== Chronograph mode ===========================
                         [2] Start/stop
                         [4] Reset (stopped)
                             Lap (running)
== Alarm mode =================================
[10 Hold] Set alarm time [2] Alarm on(<)/off
[2] Select                   
    - city               
    - hour                
    - minute             
[4] Adjust               
[10] Return              
===============================================
Reset: hold all 4 buttons      Battery: SR1130W