Helvetia 846 = AS 1739 = Dugena 1026

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11 1/2”’ | Automatic | Swiss Lever | Direct Sweeping Seconds |

Remarks:

Rotor placed out of center
Kif-Duofix combined settings for escape wheel on bridge side
Movement family:
- Helvetia 846 / AS 1739: no date
- Helvetia 847 / AS 1740: date
AS Movement family:
- - Bronze-bearing rotor:
    - AS 1656: 11 1/2”’ , flat, no date
    - AS 1673: 11 1/2”’, height like date version, no date
    - AS 1674: 11 1/2”’, date
    - AS 1675: 13”’, flat, no date
    - AS 1678: 13”’, date
  - Ball-bearing rotor:
    - AS 1695: 11 1/2”’, flat, no date
    - AS 1739: 11 1/2”’, height like date version, no date
    - AS 1740: 11 1/2”’, date

Listing ID: 11984
Manufacturer / Brand: Helvetia / AS / Dugena
Caliber: Helvetia 846 = AS 1739 = Dugena 1026
Size in French Lignes: 11 1/2'''
Size range mm largest diameter: 22 - 31 mm
Shape: Round
Winding: Automatic
Hands Setting: Crown
Seconds Hand: Sweeping seconds (central seconds)
Escapement: Lever (Swiss, English, Glashütte)
Date, Day, Month...: Date
Jewels: 25
Setting Lever Screw/Pin Position: Left
Balance Position: Bottom (120 - 240°)
Shock Protection: Incabloc
Beats per hour: 18,000
Balance Type: Glucydur
Power Reserve: Unknown
Production Period: Unknown, probably around 1969
Country: Switzerland
Identification: Marked with Helvetia logo and 846 under balance wheel, and with Dugena 1026 on the rotor. Listed in the Engelkemper catalog from 1969.