In 1961 Citizen released its new in-house fully automatic movement calibre 0361. The main new feature was a oscillating weight with no central post/bearing. The auto-winder mechanism has the oscillating weight fitted around it via a large diameter ball bearing. The rotating weight has inwards facing teeth that engage with the auto winder mechanism. Citizen must have been very inspired by the Swiss movement manufacture Fabrique d’Horlogerie de Fontainemelon had released a very similar FHF calibre 65 two years earlier. Unlike FHF Citizen where fairly successful (In the domestic Japan market) and continued production until about 1968 when it was replaced with a new generation central mounted oscillating weights that where slimmer and smoother.
family/generations:
0310: 21/23/25 jewels
0320, 0321: 17/19 jewels
0340, 0341: 35 jewels
1120, 1121: 19/21/23/27/35 jewels, date
1130, 1131…1133: 17/19 jewels, date
1150: 39 jewels, date
1160, 1161: 39 jewels, quickset date
1170: 27 jewels, quickset date
redesign, all with quickset date:
4000…4002: manual wind, 23 jewels, day, date
4101…4103: 25 jewels, day, date
4111…4113: 19 jewels, day, date
4111…4113: 19 jewels, day, date, month
4130: 35 jewels, day, date
Similar but different:
Longines launched a off-centere peripheral rotor design in the calibre 340 in 1960. In 1970 Patek Philippe launched a fully centre peripheral rotor design in the calibre 350.
The peripheral rotor design has the rotor on the outside of a movement; engaging with the auto winder gears on the side of the movement. The FHF 65 and Jet movements has the autowinder gears centrally placed on top of the movement.
Citizen Jet family
- Made from a prox 1961-1968
- Made in Japan
- Power reserve around: 47h
- 17-39 Jewels
- 18000 B/A
- Lift angle ?°
- DM 29.0mm
- H 4.65mm-6.39mm
Surface finish go from okay to fairly nice. All screws are highly polished and has a good finish. The bridges are nicely finished with rhodium or golden plating. Ratchet and crown wheel have a fair finish. Jewel count of 17-39.
Top surface finish on bridges: 5-6 Points
Surface finish on screws: 8 Points
Surface finish on ratchet and ratchet wheel: 6-7 Points
Movement Jeweling: 6-10 Points
Movement design innovation (1961): 8 points
The Citizen base plate has an overall basic finish. Winding, date and setting mechanisms are nicely made, screws have a flat finish. Gear train has a good finish. Setting the time feels balanced and smooth. Date mechanism is a little sluggish.
Base plate finish: 5-6 Points
Setting and winding mechanism: 7 Points
Gear-train finish: 8 Points
Date change snappiness 10.30-12.00: 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 a little noisy.
Autowinder mechanism: 7 Points
Bonus point is the quick set mechanism : 3 Points
The Citizen Jet movements very a bit on timekeeping from okay to very good. I find the top model 1160 series are usally very good.
Accuracy: 6-8 points
Power reserve of 47 hours is good.
Power reserve: 8 Points
Citizen jet series points summary:
Surface finish on bridges and top side of base plate: 5-6
Surface finish screws: 8
Surface finish on ratchet and ratchet wheel: 6-7
Movement Jewelling: 6-10
Movement innovative design for ca 1961: 8
Base plate finish: 5-6
Setting and winding mechanism: 7
Date change snappiness: 6
Gear-train finish: 8
Movement durability: 7
Total bonus points: 6*
Autowinder: 7
Accuracy: 6-8
Power reserve: 8
Grand total Automatic: 81-96
Could I give bonus for cool I would.
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