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Gruen 420
Ligne: 8.75'''
Jewels: 17
Power Reserve: 46 hrs
Frequency: 21600 vph
Type: Manual Wind
Period used: ~1970
Diameter: 19.4 mm
Height: 3.5 mm
Hands: 1.20 x 0.60 mm
Base: Fontainemelon 21
The Gruen 420 watch movement, also known by the names signatures 36 and 36-21, is a mechanical movement used predominantly around the 1970s. It features a manual winding mechanism, a sub-second dial, an adjustable stud holder, and shock protection.
The Gruen 420 features the following functions:
- Adjustable Stud Holder
- Manual Winding
- Shock Protection
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.60 x 0.080 x 300 x 8.0 mm | GR4448 | Manual | Buy mainspring |
| 1.60 x 0.080 x 280 x 8.0 mm | Manual | 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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