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Seiko Y643-0100
Ligne: 11 x 12.75'''
Jewels: 3
Frequency: 21600 vph
Period used: ~1975
Size: 24.65 x 28.7 mm
Height: 6.2 mm
Hands: 1.75 x 1.20 x 0.18 mm
The Seiko Y643-0100 watch movement features a pointed balance staff equipped with white jewels. Additionally, it incorporates a diode parallel to the inductor on the balance to stabilize amplitude and enhance durability by preventing sparks at the contact. The movement includes several functions such as an electromechanically controlled balance motor, sweep second hand, date setting within a range of +/-24 hours, and a hack feature. The M51 movement was commonly utilized around 1975.
The Seiko Y643-0100 features the following functions:
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
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Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
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Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
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Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
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