Seiko

Seiko Caliber 5M22: Complete Movement Guide

Seiko 5M22 factory specifications, the AGS charging system, original capacitor and revised rechargeable-unit reserve, with two documented original VWS watches.

Seiko Caliber 7A48: Quartz Chronograph Movement Guide

Factory specifications and practical moon-phase/date setting for Seiko’s 15-jewel 7A48 quartz chronograph, illustrated with three original VWS watches.

Seiko Caliber 7A38: Quartz Chronograph Movement Guide

Explore Seiko 7A38 chronograph specs, functions and day-date controls, with original VWS 1984–1986 watch examples.

Seiko Caliber 66: Complete Movement Guide

The Seiko Caliber 66 belongs to a very different chapter of the brand's mechanical history from the familiar self-winding Seiko 5. It is a compact, hand-wound movement associated with restrained 19...

Seiko Caliber 2906: Complete Movement Guide

The Seiko 2906 packs automatic winding, crown winding and a bilingual day-date calendar into an 18 mm movement. Its 28,800-vibration-per-hour frequency is particularly interesting in the small wome...

Seiko Caliber 7025: Complete Movement Guide

A Seiko from 1976 and another from 1979 may share the same automatic movement yet look as if they belong to different design families. The first has a broad, sculpted case and an unconventional arr...

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.

Seiko Caliber 2706: Complete Movement Guide

The Seiko 2706 is a compact mechanical movement with more to offer than the usual description of a small vintage automatic suggests. Inside a movement just 17.20 mm across, Seiko combined a high-fr...

Seiko Caliber 2205: Complete Movement Guide

Discover Seiko’s compact 2205A Hi-Beat automatic, its hand winding and pull-out date quickset, with two original archival watches.

Seiko Caliber 7T92: Quartz Chronograph Movement Guide

On a Seiko 7T92, the hand that appears to stop after about ten minutes is not necessarily reporting a fault. It may be performing exactly as Seiko designed it to: the 1/20-second counter rests whil...

Seiko Serial Numbers Explained

Understand the common vintage Seiko serial-number system, its month codes, earlier formats and modern exceptions—without mistaking a partial date for proof.

1980s Vintage Seiko Watches: Automatics, Quartz & Design

A guide to the mechanical automatics, sophisticated quartz chronographs, SQ dress watches and electronic breakthroughs of 1980s Seiko.

The History of Seiko 5: What Does the “5” Mean?

What does Seiko 5 mean? Explore the original five 1963 Sportsmatic features, Seiko 5 Sports history, and photographed vintage models across decades.

Seiko 6139 Pogue: Models and Variations

A reference-focused guide to Seiko Pogue 6139-6002 models, yellow and black dials, Skylab history, movement design and collector identification.

Seiko Actus: History, Models & Movements

Discover Seiko Actus history, compare 6106, 7019 and 6306 automatics, and explore two original 1974–1976 watches in the Vintage Watch Studio archive.

Seiko Rainbow: Models, Dials & Identification

Learn to identify vintage Seiko Rainbow designs through two real archive models: the 1982 7009-316A rainbow arc and 1979 11-4470 mother-of-pearl dress watch.

Seiko Scuba 200M: Vintage Dive Watches Explained

Learn how to identify a vintage Seiko Scuba 200M: compare 5H25 and 7N35 quartz models, original photographed references and the limits of an old 200m marking.

Seiko Hi-Beat: Vintage Movements & Models

What does Hi-Beat really mean on a vintage Seiko? Compare eight-beat and ten-beat movements, Seiko milestones and actual 1970s watches from the VWS archive.

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.

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.

How to Set a Vintage Seiko Day-Date Watch

A movement-aware vintage Seiko day-date setting procedure explaining safe hours, push-crown exceptions, bilingual wheels and midnight synchronization.

Vintage Seiko Watches for Women: Models, Sizes & Movements

A practical guide to vintage Seiko women’s models, petite case sizes, three movement choices, bracelet fit and real VWS archive examples.