Citizen chronometer movement review

In 1962 Citizen showed paved the way in the Japanese luxury watch market with their new Chronometer model. These watches were factory tested to keep within strict time regulations. Although not entirely sure about the tolerances it is likely to be similar to the Swiss COSC specs. I’m struggling to find the calibre name. Internet suggested 0400. Will update when I know more. 

Seiko calibre: 

  • Made approximately: 1962-1965
  • Made in Japan
  • Power reserve 53h
  • 31 Jewels 
  • 18000 B/A
  • DM: NA
  • H: NA

Surface finish on the Citizen have rhodium plating. Gear train bridge has a decent decoration and beveled edges. Screws are polished and have a good finish. Crown and ratchet wheel have a very nice finish combination of start burst and highly polished ring. The engaraved lettering has guilt finish same as the pallet cock. Note the escape wheel is situated extra low to make room for an extra larger balance wheel similar to the Zenith 135. 

Surface finish on top side of the plate and bridges: 7 Points

Surface finish on screws: 9 Points

Surface finish on crown and ratchet wheel: 8 Points

Movement Jeweling: 10 points 

Movement design innovation (for ca 1962):  8 points

The Citizen base plate on the chronometer is rather basic with no decoration, but overall well executed and a decent finish. Winding/setting mechanism is well made. Gear train has a good finish. 

Base plate finish: 6 Points

Setting and winding mechanism: 7 Points

Gear-train finish: 8 Points

Bonus point for micro regulator: 3 points

Movement durability: 8 Points

Steel inlay ring for crown wheel. 

Calibre: Chronometer

Excellent time keeping when in good condition

Accuracy: 10 points 

Power reserve of 53 hours is excellent for 1962

Power reserve: 10 Points

Citizen calibre chronometer points summary: 

Surface finish on bridges and top side of base plate: 7

Surface finish top screws: 9

Surface finish on ratchet and ratchet wheel: 8

Movement Jeweling: 10

Movement innovative design for ca 1962: 8 

Total bonus points: 3

Base plate finish: 6

Setting and winding mechanism: 7 

Gear-train finish: 8

Movement durability: 8

Accuracy: 10

Power reserve: 10

Grand total: 94