Seiko

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.
Read more
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.
Read more
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.
Read more
Compare the Seiko 6306 and 6309 movements, Turtle diver references and lesser-known Actus and dress-watch models.
Read more
Understand what separates vintage Lord Matic and Seiko 5 watches, from movement functions to designs and buying checks.
Read more
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...
Read more
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...
Read more
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...
Read more
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...
Read more
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...
Read more



