The Grand Seiko caliber 430, later renamed 5722, is a manual winding mechanical movement, introduced in 1964 (production began in 1963) with the Grand Seiko second model, known as Self-Dater for being the first Grand Seiko with date function.
There are three different versions of this movement: the 430, the 5722A and the 5722B.
| Caliber | 430 (later renamed 5722) |
| Type | Mechanical Manual |
| Family | 57GS |
| Year | 1964 (production began in 1963) |
| Jewels | 35 |
| Bph | 18,000 (430, 5722A) 19,800 (5722B) |
| Complications | Date |
| Technical information | Japanese (430, 5722A) Japanese – English (5722B) |
Grand Seiko watches with caliber 430/5722
Ref. 43999 (SD)
Movement: 430
Type: manual
Jewels: 35
Case: stainless steel
First version of the Self Dater, with SD dial.
Ref. 43999 (AD)
Movement: 430
Type: manual
Jewels: 35
Case: stainless steel
First version of the Self Dater, with AD quadrant.
Ref. 5722-9990
Movement: 5722
Type: manual
Jewels: 35
Case: stainless steel
Model updated according to the new standards for Seiko case-movement references. “Chronometer” written on the dial.
Ref. 5722-9000
Movement: 5722
Type: manual
Jewels: 35
Case: 18k gold
Self Dater with solid gold case. “Chronometer” written on the dial.
Ref. 5722-9970
Movement: 5722
Type: manual
Jewels: 35
Case: stainless steel
Reference commissioned by Toshiba, for employees who had completed 25 years of work in the company. Recognizable by the writing on the back of the case, the 1965 and 1966 versions had the Chronometer writing under the Seiko logo, no longer present in the 1967 and 1968 versions.
Ref. 5722-9991
Movement: 5722
Type: manual
Jewels: 35
Case: stainless steel
Chronometer writing no longer present.
Ref. 5722-9010
Movement: 5722
Type: manual
Jewels: 35
Case: gold cap
Ref. 5722-9011
Movement: 5722
Type: manual
Jewels: 35
Case: gold cap
Ref. 5722-9001
Movement: 5722
Type: manual
Jewels: 35
Case: 18k gold
Self Dater with soilid gold case, Chronometer writing no longer present.