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Seiko 7005A
Ligne: 11'''
Jewels: 15/17
Power Reserve: 36 hrs
Frequency: 18000 vph
Type: Automatic
Period used: 1935-1945
Diameter: 24.8 mm
Height: 5.75 mm
Hands: 1.20 x 0.85 x 0.22 mm
The Seiko 7005A watch movement is an early bumper automatic mechanism developed by A. Schild. It is a redesign of the Harwood automatic movement and features a modification from the Jules Jurgensen 300486, namely the use of a Breguet hairspring instead of a flat hairspring. The specific differences between the A. Schild 1172 and the 1173 are unknown. The movement incorporates various functions including automatic winding and a sweep second hand. It was utilized during the period of 1935-1945.
The Seiko 7005A features the following functions:
- Automatic (bumper)
- Sweep second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|---|---|
| 143 | Ordinary/None | Buy staff |
| 2906 | Ordinary/None | Buy staff |
| 262 | Incabloc | Buy staff |
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.60 x 0.075 x 240 x 7.5 mm | Auto | Buy mainspring | |
| 1.60 x 0.070 x 250 x 7.0 mm | Auto | Buy mainspring | |
| 1.60 x 0.075 x 240 x 7.0 mm | GR4437X | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
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