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Alpina 609
(Alpina Straub)
Ligne: 12'''
Jewels: 16
Power Reserve: 45 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1955
Diameter: 27.1 mm
Height: 5.7 mm
Hands: 1.50 x 0.80 x 0.21 mm
Base: Angelus 251
The Alpina 609 is a manual wind watch movement that features a unique Incastar regulator. This regulator incorporates a free oscillating hairspring, with the end of the spring fixed between two rollers to adjust its length. This design eliminates the isochronism error caused by the gap between regulator pins. Additionally, the Alpina 609 movement offers various functions, including a sweep second hand, day/date adjustments using dedicated pushers at 8:30h and 9:30h respectively, and a moon phase display set by a pusher at 7:30h. This movement was commonly used in watches around 1955.
The Alpina 609 features the following functions:
- Calendar
- Date: set by pusher at 9:30h
- Day: set by pusher at 8:30h
- Manual Winding
- Moon phase: set by pusher at 7:30h
- Sweep Seconds
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.70 x 0.100 x 385 x 10.5 mm | Manual | Buy mainspring | |
| 1.70 x 0.105 x 300 x 9.0 mm | GR4895 | Manual | Buy mainspring |
| 1.70 x 0.110 x 260 x 8.0 mm | GR4904 | Manual | Buy mainspring |
Parts Listing
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