Seiko 6155 Movement Details
                
                Seiko caliber 6155 is a high grade automatic (with hand winding) watch movement. Production started around 1970.
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| Sub-brands: | Grand Seiko | 
| Day / date? | Date only | 
| GMT / world time? | No | 
| Chronograph? | No | 
| Hacking? | Yes | 
| Rate: | 36,000 bph | 
| Number of jewels: | 25 | 
| Size / diameter: | 27.0mm | 
| Height: | 5.65mm | 
| Development division: | Suwa (Nagano Prefecture, Japan) | 
| Notes: | Only released as model 6155-8000. The same as cal. 6156 but without day display (date only). | 
| Related movements: | 6145 6146 6156 | 
Part Codes
| Stem code: | 354616 | 
| Balance wheel code: | 310617 | 
| Mainspring code: | 201595 | 
| Date wheel code: | 801615 | 
| Screw codes: | 022150 (stud screw), 022252, 022269, 022270, 022271, 022351, 022372, 022458 (screw for oscillating weight), 022468, 022662, 022677, 022689, 022760, 022761 (dial screw) |