Full Frame – Grand Seiko 4580-7010 VFA movement

Every Monday, I’ll be posting a new full resolution image that you can zoom into and pan around for yourself.

Featuring in this week’s “Full Frame” is the movement of the Grand Seiko 4580-7010. A slightly smaller – yet no less impressive – image than usual, since when tilting and swinging the focal plane to the extent that it is in this shot, I can’t get as much magnification.

Before getting onto the photograph itself, this is probably a good opportunity to clear up some confusion that is out there as to the number of 4580 movements that were created, and where they ended up.

Following the end of the Neuchatel Observatory Chronometer trials, Seiko submitted for certification a number of 4520 and 4580 movements in the years 1968 through to 1970.

In 1968, 103 examples of the 4520 caliber were submitted, of which 73 passed certification.

In 1969, 30 examples of the 4580 caliber were submitted, of which 25 passed certification.

In 1970, a further 150 examples of the 4580 caliber were submitted, of which 128 passed certification.

That much is widely written up and accepted. Where the confusion lies is how these movements were cased up and sold.

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Grand Seiko 4580-7010 VFA movement

Another angle on the movement of the vintage Grand Seiko 4580-7010 “Very fine adjusted”. The objective that Seiko set themselves when starting Grand Seiko was a simple one – to create the ideal watch. To my mind, no other watch in the vintage Grand Seiko range can compete with this one. It truly is the greatest time only wristwatch of its generation.
Hailing from June 1970, with a movement certified by the Neuchatel Astronomical Observatory, this watch would have come to the market just as the quartz revolution was starting to change the watch industry forever.
With the modern resurgence and appreciation for both mechanical watches in general, and Grand Seiko in particular, wouldn’t it be wonderful to see Seiko introduce a VFA selection into the modern Grand Seiko range? Let’s see that +/-2 seconds per day rating and one minute per month accuracy guarantee for two years once again @seikowatchjapan!

#Seiko #GrandSeiko #グランドセイコー #セイコー #VFA #45GS #4580

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Grand Seiko 4580 VFA movement

Something very special for this week’s Grand Seiko Wednesday. I finally got the correct tools to be able to safely remove the case back of my 4580-7010 VFA, and I think you’ll agree it was worth the wait.
Just look at that. Absolutely no debate that this watch resides at the pinnacle of the entire vintage Grand Seiko collection.

There is a lot of confusion “out there” regarding the use of the 4520 and 4580 movements in the Seiko Astronomical Observatory Chronometer and the 4580 VFA’s. Next week I will do a proper write-up that should clear up any questions. For now, just sit back and admire this incredible movement.

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The Grand Seiko VFA holy trinity

Grand Seiko VFA’s – top left, the 6185-8021-G; top right, the 6186-8000-G; below, the 4580-7010.

This one took hours to set-up – it’s a single shot from a 5 image focus stack, not a composite put together in Photoshop. Hope you like it, because it’s probably my favourite watch shot to date 😛

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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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