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Seiko

1972 Seiko 7005-5020 with purple date-only dial and polygonal steel case

Seiko Caliber 7005: Complete Movement Guide

1972 Seiko 7005-5020 with purple date-only dial and polygonal steel case
1970s

Seiko Caliber 7005: Complete Movement Guide

Seiko 7005A explained: verified 17-jewel automatic specifications, date-only calendar, crown operation, winding architecture and two photographed 1970s Seiko watches.

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Seiko Lord Matic Special 5206-6000 from 1971 with silver dial, framed day-date and steel bracelet
1970s

Seiko Lord Matic (LM): History, Models & Movements

Explore Seiko Lord Matic history, standard LM versus LM Special movements, distinctive 1970s models and original Vintage Watch Studio archive photography.

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Seiko SQ 7545-7030 from 1979, silver analog dial with SQ emblem and date, shown on its original steel bracelet
1970s

Seiko SQ: History, Models & Quartz Technology

Discover Seiko SQ quartz history and the differences between 1970s–1990s Seiko SQ watches, illustrated with five original vintage examples.

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1976 Seiko 5 Actus SilverWave 6306-8000, silver dial, original VWS product photograph
1970s

Seiko 6306 vs 6309

Compare the Seiko 6306 and 6309 movements, Turtle diver references and lesser-known Actus and dress-watch models.

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1977 Seiko 5 6319-5020 square silver-dial automatic wristwatch, VWS archive front view
1970s

Seiko Lord Matic vs Seiko 5

Understand what separates vintage Lord Matic and Seiko 5 watches, from movement functions to designs and buying checks.

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1977 Seiko 6139-6002 Pogue chronograph with orange dial and red-and-blue tachymeter bezel
1970s

Seiko Caliber 6139: Complete Chronograph Movement Guide

Pull the crown on a Seiko 6139 and the hands can be set. Press that same crown and the calendar changes instead. Those controls belong to one of the most significant early automatic chronograph mov...

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1977 Seiko 5 6319-8100 with striped blue dial, framed day-date and brown strap
1970s

Seiko Caliber 6319: Complete Movement Guide

Why does one 1970s Seiko automatic carry 17 jewels and another, outwardly similar watch, say 21? The 6319 is an unusually clear answer. Seiko's original parts catalogue identifies the 6319A as a 21...

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Seiko 5 Baby Monaco ref. 7019-5000 from 1975, dark charcoal dial with 21 jewels printing, squared stainless steel case and brown leather strap
1970s

Seiko Caliber 7019: Complete Movement Guide

Some vintage Seiko watches identify themselves immediately: the squared cushion case of a Baby Monaco, the restrained silver dial of an Actus, or the dark blue face of a mid-1970s Seiko 5. Their sh...

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1971 Seiko Lord Matic LM 5606-7160 with emerald green dial, 25 jewels text, day-date window and silver mesh bracelet
1970s

Seiko Caliber 5606: Complete Movement Guide

A green Lord Matic with 25 jewels on the dial and a blue one marked 23 jewels can both legitimately contain a Seiko 5606. The caliber is associated with Seiko's Lord Matic era, but its real interes...

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1992 Seiko Scuba 200M 7N35-6020 with dark blue dial, gold-tone markers, two-tone bezel and matching bracelet
1970s

Seiko Caliber 7N35: Complete Quartz Movement Guide

The Seiko Caliber 7N35 is an analogue quartz movement best understood through three questions: what its factory documentation actually promises, how its date and battery indicators are meant to wor...

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