| Power reserve: | 50 hours | 
                  
                  
                    | Accuracy: | +15/-10 seconds/day (Seiko "B" standard) | 
                  
                  
                  | Day / date? | No | 
                  
                  
                  | GMT / world time? | No | 
                  
                  
                  | Chronograph? | No | 
                  
                  
                  
                  | Hacking? | Yes | 
                  
                  
                    | Rate: | 28,800 bph | 
                  
                  
                    | Number of jewels: | 20 | 
                  
                  
                  
                    | Size / diameter: | 28.4mm | 
                  
                  
                  
                  
                    | Development division: | Shizukuishi Studio (Iwate Prefecture, Japan) | 
                  
                  
                    | Notes: | Has a seconds sub-dial. This movement was only used in a railway pocket watch, model 8L34-0010 (SCVR001), part of Seiko's Historical Collection in 2000. It's the only hand-winding movement in the 8L series. | 
                  
                  
                    | PDF guides: |  | 
                  
                  
                    | Related movements: | 9S54 |