The Seiko Almanac · by Tiny Hour Tales
Model referenceCal. 2320

Seiko RQC028

アシエ (acier) · catalogued in 1979

Case
SS
Dial
silver
List price
¥100,000
Seiko RQC028 as pictured in the Seiko V2, page 28
From the 1979 Seiko catalogue, page 28View Page

Identifiers

Caliber
2320
Case–dial code
504-004

From the catalogue

Dial
silver
Case
SS
Bracelet
XHB140
List price
¥100,000
Specs
クオーツ · サファイヤガラス · 使用電池SB-AG

Appears in

Available at Tiny Hour Tales

Same caliber, in the shop now

Not this exact reference — but the shop’s listing names the same 2320 movement.