The Seiko Almanac · by Tiny Hour Tales
Model reference

Seiko 90ST-220

stopwatches (ストップウオッチ) · catalogued in 1968

Case
ACRP
Jewels
7
List price
¥7,300 (ACRP)
Seiko 90ST-220 as pictured in the 1968 Seiko JDM Catalog No.2, page 49
From the 1968 Seiko catalogue, page 49View Page

Identifiers

Case–dial code
501-510

From the catalogue

Case
ACRP
Jewels
7
List price
¥7,300 (ACRP)
Specs
stopwatch · pulsimeter

セイコーストップウオッチ (Seiko Stopwatch); 特殊ストップウオッチ(90ST) — special-purpose versions of the standard stopwatch; パルスメーター

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