
Quartz Watches
SEIKO Cal.3863A
RICOH cal.571010 1973
OMEGA Megaquartz 32
KHz 1973
Pulsar Time-Computer
Calculator movement 1975
SEIKO/SUWA GRAND QUARTZ / TWIN-QUARTZ cal.9943A 1978
SEIKO/KAMEIDO GRAND QUARTZ /
TWIN-QUARTZ cal.9256A 1978
SEIKO cal.7A28 1983
→ 1990〜 1
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