State of the collection – the 45GS movements

A write up of the vintage Grand Seiko watches in my collection that utilise the 45GS movements.

Since there are over 40 pieces in the collection, it makes sense to break this “state of the collection” write-up over several articles. Each post will cover a specific movement – or set of movements – from the vintage Grand Seiko releases, and include photos of the watches I have that utilise that movement.

Whilst I don’t intend these articles to provide a comprehensive and thoroughly researched scholarly history of vintage Grand Seikos, I will share some knowledge on the pieces that I have picked up over the course of the last year. If I get anything wrong, please don’t hesitate to let me know!

Grand Seiko 4520-7000
Grand Seiko 4520-7000

The 45GS series started production in 1968, continuing through until the early 1970’s. Like the earlier and short-lived 44GS series, they were produced by the Daini factory.

Whilst utilising only three different movements – the dateless 4520A; the 4522A with a date complication; and the incredibly rare 4580 Very Fine Adjusted, there were a good variety of case and dial designs created over this period.

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Grand Seiko 4580-7010 VFA

Grand Seiko 4580-7010 from 1970.

This is the fourth and final VFA (“Very Fine Adjusted”) in the collection, and surely the pinnacle of the entire vintage Grand Seiko range. Manual wind, no date, and when released, guaranteed to what was a previously unheard of accuracy of +/- 2 seconds per day, and a mean monthly accuracy of +/-60 seconds for two years.

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