Following the Swiss protesting about Seiko using the word “Chronometer” on the dials of watches that actually bested the chronometer specifications of the Swiss manufactures, Seiko had to make some pretty significant changes to the references that sat at the top of their ranges, including of course the Grand Seiko 57GS series.

This can be seen most clearly when we take a look at the lead page of 1967’s Seiko “No. 2” catalogue, and compare it with that of 1968’s “Volume 1”, which we share below.

But in addition to the enforced changes to the dial, there were also a number of other updates that Grand Seiko introduced with the 5722-9991.

Here are a pair of photographs showing the earlier 5722-9990 alongside the 5722-9991 –

As can be seen from the above image, there were substantial changes made to the dial layout, which mirror those also seen on the 62GS and 44GS that were listed alongside the 5722-9991 in volume 1 of 1968’s catalogue.

References from all three series have an applied Seiko logo placed in the top half of the dial, and then an applied “GS” logo in the bottom half, with the text “GRAND SEIKO” and “DIASHOCK” printed underneath.

The other – slightly more subtle – difference that can be seen between the 5722-9990 and 5722-9991 is that the crown on the latter is now the “fine knurled” version. As we have mentioned in earlier articles, it is common to find references from the 57GS series with all manner of combinations of dial, crown, caseback and movement, but we do have our preferred “pure” variants, and for the 5722-9991, that means a fine knurled crown.

Externally, the other big update is that the medallion on the case back is now “GS” branded, rather than featuring the Seiko Lion, which indicated the watch was manufactured to chronometer specifications.

Below we show the original lion medallion, as seen on the 43999 and 5722-9990, alongside the GS medallion found on the 5722-9991.

Internally, there is a significant update as the 430/5722A movement as found on the earlier watches in the 57GS series is replaced by the 5722B movement.

Whereas the 430/5722A ran at 18,000bph, for the 5722B the rate was increased to 19,800bph. This update required changes to the design of many of the movement parts. For those interested in the full details, we have all the available parts guides for vintage Grand Seiko movements, which can be found here.

Purchasing opportunities

We currently have a couple of examples of this reference available for purchase.

The first can be found at the following link – please note that this watch has had its dial re-printed at some point in the past, and the asking price reflects this fact.

Although currently not listed as a product on the site, a second example of this reference – the one pictured in the lead photo to this article – is also available for purchase. The price for this watch is $2,200. If you are interested in purchasing it, please don’t hesitate to get in touch.

Catalogues and other official Seiko publications

The catalogue history of the 5722-9991 is a little confusing because, whilst it is first seen in the supplement to 1966’s “No. 1”, 1967’s “No. 2” catalogue shows the 5722-9990, with the -9991 making a return for 1968’s “No. 1”, before making its final appearance in 1968’s “No. 2”.

It seems clear to us that Seiko simply used the wrong stock image for 1967’s “No. 2” catalogue. We will however stick with what we see, and below are links to the catalogues in which the 5722-9991 is featured.



In addition to being featured in the above catalogues, the 5722-9991 makes appearances in the monthly Seiko Sales publications that were distributed to retailers. LInks to articles including scans of those magazines are provided below.



Very rarely we are able to pick up an original advert for a vintage Grand Seiko. Typically these adverts are discovered cut from newspapers or magazines from the time.

Below is a scan of an advert that featured the 5722-9991.

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