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Certina 17-221
Ligne: 10.5'''
Jewels: 17
Lift Angle: 52°
Power Reserve: 34 hrs
Frequency: 18000 vph
Type: Automatic
Period used: ~1955
Diameter: 23.7 mm
Height: 5.6 mm
Hands: 1.30 x 0.80 x 0.20 mm
Base: ETA 1307
The Certina 17-221 is an automatic watch movement belonging to the equivalent automatic family, Eterna 1319 through 1324, with ball bearing technology. The specific differences between the Certina 17-221 and the ETA 1307 are not known. This movement features functions including automatic winding, a sweep second hand, and it was commonly used in timepieces around the 1955 period.
The Certina 17-221 features the following functions:
- Automatic Winding
- Sweep second
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.35 x 0.085 x 260 x 8.0 mm | GR3486X | Auto | Buy mainspring |
| 1.35 x 0.080 x 250 x 7.5 mm | Auto | Buy mainspring |
Incabloc Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) | |
|---|---|---|---|
| See More |
KIF Part Listing
| Block # (Top/Bottom) | Cap Jewel # (Top/Bottom) | Spring # (Top/Bottom) |
|---|
Documents
Parts Listing
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| GIB/BOLT INCA 240X19 THICK | 400/1 | 180.19/INCA #11 | Buy part |
| JEWEL, INCA BALANCE 135X50X09 | 400/11 | 111.09/INCA#8 | Buy part |
| JEWEL, INCA UPPER CAP 120X27 | 400/7 | 121.11/INCA #5 | Buy part |
| JEWEL, UPPER CAP INCA 120X18 | 400/8 | 122.11/INCA #6 | Buy part |
| SCREW, INCA SHOCK 18X60 | 400/3 | 160.11/INCA #15 | Buy part |
| SHOCK SPRING, UPPER INCABLOC | 400/4 | 170.03/INCA #1 | Buy part |
| SHOCK UNIT, LOWER INCA | 400/32 | 100.20.9 | Buy part |
| UPPER UNIT D282 H9 | 400/832 | 100.11.282.9 | Buy part |
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