Model reference
Seiko 21CRQ-S-400
ladies' calendar (カレンダーグループ) · catalogued across 1968 · 1969 · 1972
- Case
- PDP / SGP
- Jewels
- 23
- Dial
- silver
- List price
- ¥7,500 (PDP) / ¥7,500 (SGP)

Identifiers
- Case–dial code
- 320-005
From the catalogue
- Dial
- silver
- Case
- PDP / SGP
- Bracelet
- LB
- Jewels
- 23
- List price
- ¥7,500 (PDP) / ¥7,500 (SGP)
- Specs
- date (window at 6) · quick-set date (quick change)
コーラスカレンダー (Chorus Calendar); クイックチェンジ; the same symbol and number is also printed for a different watch: p.35 21石 (320-004); p.35 17石 (320-002)
Appears in
- Seiko JDM Catalog No.1p.34 · view page
- Seiko JDM Catalog No.1p.35 · view page
- Seiko JDM Catalog No.1p.35 · view page
- 1969 Seiko JDM Catalog No.2p.65 · view page
- 1969 Seiko JDM Catalog No.2p.65 · view page
- Seiko JDM Catalog No.1p.49 · view page
- Seiko JDM Catalog No.1p.49 · view page
- 1972 Seiko Catalog Vol.1p.116 · view page
Elsewhere at Tiny Hour Tales
Seiko pieces in the shop now
Not this reference or caliber — simply the Seiko-family watches available today.




