Watch Database
Gruen 405
Ligne: 17'''
Jewels: 15/16/17
Power Reserve: 34 hrs
Frequency: 18000 vph
Type: Manual Wind
Period used: ~1925
Diameter: 38.7 mm
Height: 5.05 mm
Hands: 1.75 x 1.10 / 0.22 mm
The Gruen 405 watch movement is a hunter calibre with optional bimetallic screw balance and Breguet hairspring. It shares similarities with the 764, but the specific differences are unknown. The movement features stem wind and set, sub-second, left setting, and stem winding functions. It was utilized primarily around 1925.
The Gruen 405 features the following functions:
- Stem wind and set
- Sub Second
Balance Staff Listing
| Ronda Reference # | Shock System | Buy |
|---|
Mainspring Listing
| Dimensions | GR Reference # | End Type | Buy |
|---|---|---|---|
| 1.80 x 0.180 x 500 x 15.0 mm | GR5384 | Manual | Buy mainspring |
| 1.80 x 0.180 x 450 x 15.0 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
| Part Description | Reference # | Alternate | Buy |
|---|---|---|---|
| PALLET ARBOR | 72S/122P | 714/TAV 764 | Buy part |
| SCREW, CLUTCH LEVER | 5445/221 | Buy part | |
| SET SPRING FLAT | 440/806 | 19/2 | Buy part |
| STAFF= TAV 764 .75 HSPG. | 100/2 | Buy part | |
| STEM | 200/948F | Buy part |
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