In 1962 Buren released it’s second generation micro rotor movement based on the original design of the calibre 1000 launched in 1957 that has been the world’s first micro rotor movement.
family/generations:
1280: only hour, minute
1281: date for flat dial
1282: date for domed dial
1320: second
1321: second, date for flat dial
1322: second, date for domed dial
Note the automatic device is very efficient and smooth, but the reverser wheel design makes manual wind hard and not very smooth.
Buren 1280:
- Made from a prox 1962-1970
- Made in Switzerland
- Power reserve around: 54h
- 30 Jewels
- 19800 B/A
- Lift angle 48°
- DM 28.5mm
- H 2.85mm
Surface finish are tidy, but not decorated some other brands using this movement add extra decoration. All screws are highly polished and a fine finish. The bridges are finished with rhodium. Ratchet and crown wheel have a fair finish. High Jewel count of 30 on the base movement.
Top surface finish on bridges: 6 Points
Surface finish on screws: 8 Points
Surface finish on ratchet and ratchet wheel: 7 Points
Movement Jeweling: 9 Points
Movement design innovation (1962): 9 points
The Buren base plate has an overall basic finish. Winding, date and setting mechanisms are well made, screws are highly polished. Gear train has a good finish. Setting the time feels balanced and smooth. Date mechanism is a little sluggish.
Base plate finish: 5 Points
Setting and winding mechanism: 7 Points
Gear-train finish: 8 Points
Date change snappiness 11.00-12.00: 6 Points*
Day date bonus point and and snappiness 11-12.30: 3*
Movement durability: 7 Points
Bi-directional automatic device is well made and very effective, but let down by the reverser wheel design making manual winding an unpleasant experience.
Autowinder mechanism: 7 Points
Micro regulated stud carrier (beat error) and time adjustment.
Bonus points: 6
The Buren: 1280 is a precise movement when in good condition.
Accuracy: 8 points
Power reserve of 54 hours is excellent.
Power reserve: 9 Points
Buren calibre: 1280 points summary:
Surface finish on bridges and top side of base plate: 6
Surface finish screws: 8
Surface finish on ratchet and ratchet wheel: 7
Movement Jewelling: 9
Movement innovative design for ca 1962: 9
Base plate finish: 5
Setting and winding mechanism: 7
Date change snappiness: 6*
Gear-train finish: 8
Movement durability: 7
Total bonus points: 6
Autowinder: 7
Accuracy: 9
Power reserve: 9
Grand total Automatic: 97-103
I would give bonus points for cool if I could.
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