The Seiko Almanac · by Tiny Hour Tales
Model reference

Seiko 51-5-274

five group (ファイブグループ) · catalogued in 1969

Case
SS
Jewels
23
Dial
blue
List price
¥11,500
Seiko 51-5-274 as pictured in the 1969 Seiko JDM Catalog No.2, page 18
From the 1969 Seiko catalogue, page 18View Page

From the catalogue

Dial
blue
Case
SS
Bracelet
MB
Jewels
23
Water resist.
WP
List price
¥11,500
Specs
automatic (自動巻) · Hardlex crystal (ハードレックス付)

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