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Authored by Martback


I have not been able to find any summaries of early Seiko analog quartz calibers so I did a compliation of available sources and added pictures of the watches in my collection. The bracketed figures is accuracy measured in seconds per month unless otherwise stated. I have also added additional caliber designations, such as "36SQC" and a few bits and pieces of additional information that I thought might be interesting.

The period chosen is from the introduction of the Seiko Quartz watches until the end of the "Golden Era" of Seiko Quartz development in the beginning of the 1980s. With a few exceptions, Seiko never again tried to achieve the accuracy of the quartz watches of the late 70s and the early 80s.

The information in the table is not always consistent in the different sources so I have chosen the most reasonable where possible and listed the differing information where it has no been possible to choose. The dates stated below is the initial year of production for a series and certain calibers within a series may have been introduced in later years.

Unfortunately, the formatting on this and other fourms does not allow for tables or great legibility but I will try to make an excel version at a later time when corrections and additional information is available. Any corrections, comments or additions are very welcome posted to this post or sent to me by email. I will try to update the table whenever additional information so merits.

/ martin



SEIKO ANALOG QUARTZ CALIBER TABLE 1964-1980

1964, Crystal Chronometer, JPY 129,000

1969, 35 Series, Suwa, 3500 (5) caliber, 8,192 Hz, Quartz Astron JPY 450,000, 100 watches produced

1970, 35SQW, Suwa, 16,384 Hz, 1800 watches produced

1970, 36 series, Daini, 3600, 3602 and 3605 36SQC (5) calibers, 1000 watches produced, First CMOS

1971, 38 series, Suwa, 3800 (15), 3802 (15), 3803 38QTW (15), 3820 (15), 3823 VFA 38SQW (5) JPY 150,000, 3862 (20), 3863 QR (20), 3870 (10), 3883 Superior (2, 1) and 3819 38DQC duotime (10)

1972, 03 SQ series, 0300 caliber, 90 watches produced

1972, 39 series, Daini, 3922 VFA LED battery indicator (5) JPY 98,000 and 3923 VFA (5) JPY 98,000

1974, 41 series, Suwa, 4100 41QD (15), 4110A (15), 4110B (15), 4130A (15, 20), 4120 (15) and 4122 (15)

1974, 08 series, 0822 (15), 0823 (15), 0841 (15), 0842 (15), 0843 (10), 0852 (10) and 0853 King Quartz (10)

1975, 43 series, 4300 (20), 4301 (20), 4302 (20), 4303 (20), 4312 (15), 4316 (15), 4325 (15), 4326 (15), 4335 (15), 4336 (15), 4366 (10)

1975, 09 series, 0903 QZ (15), 0920 QZ (15), 0922 (15) and 0923 (15)

1975, 48 series, Suwa, 4821 48KQ First with 5 year battery life (10), 4822 (10), 4823 48KQW (10), 4826 First Solar Cell (10), 4840 (15), 4842 (15), 4843 48GQW (5, A10, B15), 4803 (15) and 4883 Superior (1, A10, B15)

1977, 75 series, Suwa, 7546 75SQ Type II (15), 7518 visually impaired (15), 7545 (15), 7548 (15), 7549 (15), 7550 (15) and 7559 with light (15)

1977, 79 series, Suwa, 7902 (15), 7903 (20, 15) and 7918 (20)

1978, 23 series, Suwa, 2320 (15) and 2340 (15)

1978, 92 series, Daini, Twin Quartz, 9256 92GQW JHQ system (10py)

1978, 99 series, Suwa, Twin Quartz, 9923 99KQW (20py), 9940 (10py), 9942 (10py), 9943 99GQW (10py), 9980 (5py), 9983 Superior (5py), 9920 (20py) and 9921 (20py)

1978, 93 series, Suwa, 9320 Super thin (0,9 mm) (15)

1978, 59 series, Daini, 5931 Eagle pulse correction circuit (15)

1979, 97 series, Daini, Twin Quartz, 9721 (20py), 9722 97KQC JHQ system (20py), 9723 (20py) and 9726 (20py)

1979, 60 series, Suwa, 6020 (15) and 6030 (15)

1979, 26 series, Daini, 2620 (15), 2621 (15), 2622 (15), 2623 (15), 2625 150 m diver (15), 2626 (15), 2628 (15), 2632 (15), 2633 (15) and 2639 (15)

1980, 96 series, Suwa, Twin Quartz, 9641 (20py), 9642 (20py), 9661 (20py), 9681 JHQ system (5py) and 9182 (5py)

1980, 94 series, Daini, Twin Quartz, 9441 (20py), 9442 (20py), 9443 94KQW (20py), 9481 (5py), 9483 Superior (5py) and 9461 94GQ (10py)

1980, 72 series, Daini, 7223 with alarm (15)


Pictures:

1964 - Crystal Chronometer


1971 - 3863 QR


1972 - 3923 VFA with box
[img]

1974 - 0853 King Quartz
[img]http://i83.photobucket.com/albums/j302/martback/Collection/KingQuartzMedium.jpg

1975 - 0920 QZ


1977 - 7559 with light
[img]

1978 - 9256 Grand Quartz
[img]

1978 - Superior Twin Quartz Box
[img]

1978 - 9943 Grand Quartz
[img]





Sources:

Seiko Quartz Table
[color=rgb(0, 0, 0)][url=http://www.ne.jp/asahi/net/homepage/shucal03.html]http://www.ne.jp/asahi/net/homepage/shucal03.html[/url][/font]

Pieter Doensen, WATCH. History of the modern wrist watch.
[color=rgb(0, 0, 0)][url=http://www.xs4all.nl/~doensen/index.html]http://www.xs4all.nl/~doensen/index.html[/url]

Seiko Battery list
[color=rgb(0, 0, 0)][url=http://www.makedostudio.com/watches/seiko-batteries.pdf]http://www.makedostudio.com/watches/seiko-batteries.pdf[/url]

The Seiko Book (Goods Press Special, Tokuma Shoten 1999)

[font=verdana]Update - Type IIs like the 71 and the 75 series are usually late 70s (77-79). gmtplusnine did a good post on these; [color=rgb(0, 0, 0)][url=http://www.gmtplusnine.com/2008/06/0...ce-of-history/]http://www.gmtplusnine.com/2008/06/0...ce-of-history/[/url][/font]. I found a 78 series on this page[color=rgb(0, 0, 0)][url=http://www.mr-coo.com/battery/seiko/seiko.html]http://www.mr-coo.com/battery/seiko/seiko.html[/url] which also looks like late 70s (79-80). This site is in general a good source of info for 70s and 80s quartz watches with lots of pictures. Finally, the 82s, which I think are often SilverWaves, I would put at 1980-81. As long as you get the starting point more or less correct, there should not be any major problem in dating from the serial number as none of these watches would have been produced for 10 years.
 
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