The Seiko Almanac · by Tiny Hour Tales
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)
Seiko 21CRQ-S-400 as pictured in the Seiko JDM Catalog No.1, page 34
From the 1968 Seiko catalogue, page 34View Page

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)

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