| Sub-brands: | SQ | 
                  
                  
                  
                    | Battery: | SR43SW / 301 (Silver oxide) | 
                  
                  
                  
                    | Accuracy: | ±15 seconds/month | 
                  
                  
                  | Day / date? | Date only | 
                  
                  
                  | GMT / world time? | No | 
                  
                  
                  | Chronograph? | No | 
                  
                  
                  
                  
                    | Rate: | 32,768 Hz | 
                  
                  
                    | Number of jewels: | 4 | 
                  
                  
                  
                    | Size / diameter: | 27.0mm | 
                  
                  
                    | Height: | 4.6mm | 
                  
                  
                  
                    | Development division: | Suwa (Nagano Prefecture, Japan) | 
                  
                  
                    | Notes: | The same as cal. 7546 but without day display (date only). Has a battery life indicator function where the seconds hand moves in two-second intervals when the battery is running low. | 
                  
                  
                    | PDF guides: | Parts list
                              
                                 : 7545A | 
                  
                  
                    | Related movements: | 7546 
                    
                        7548 
                    
                        7549 |