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+====== Seiko Grand Quartz ======
+{{wst>author|[[Foskett, Stephen|Stephen Foskett]] ([[https://grail-watch.com/|Grail Watch]])}}
+**Grand Quartz** was a high-end [[quartz watch]] brand from [[Seiko]] in the 1970s and 1970s. It is analogous to [[Grand Seiko]] but was not positioned as high. Grand Quartz fell below [[Seiko Superior]] and above [[Seiko King Quartz]] in the brand's hierarchy at the time.
+===== History =====
+The Grand Quartz brand debuted in [[1975]] as the new [[Seiko 48|Cal. 48 quartz movements]] were introduced. Produced by [[Suwa Seikosha]], they gradually replaced the [[Seiko 38|38SQ V.F.A. line]] also produced by this factory. The last 38SQ V.F.A. disappears from the catalog after [[1976]], with more emphasis given to the less-expensive Grand Quartz 48GQ. The 48GQ line was available with day and date (48GQW Cal. 4843), date-only (48GQC Cal. 4842), or time-only (48GQ Cal. 4840). These ranged in price from 58,000 to 100,000 Yen, though the line debuted with million-Yen solid gold bracelet models in [[1975]]. They were removed from the catalog after [[1978]].
+Suwa's "[[Twin Quartz]]" 99GQ appears in the second catalog in [[1978]] alongside the 48GQ models. These super-accurate Grand Quartz watches sold for substantially more than their predecessors at 80,000 to 150,000 Yen, though the cases and designs were similar. Once again, the line was available in day-date (99GQW Cal. 9943), date-only (99GQC Cal. 9942), and time-only (99GQ Cal. 9940). The date-only model disappears from the catalog after [[1981]], and the rest are retired in [[1985]] along with the Grand Quartz name.
+[[Daini Seikosha]] also produced a Grand Quartz watch for a short time. Introduced in [[1978]], the 92GQ used Daini's [[HAQ]] [[Twin Quartz]] movement. [[Seiko 92|Cal. 9256]] was a day and date movement (92GQW) and was priced alongside the Suwa models. The 92GQ line lasts in the catalog only through [[1980]].
+Some sources suggest that there was a 94GQ produced using Cal. 9461 as well, but this is not found in contemporary catalogs.
+The Grand Quartz line was discontinued in [[1985]], but just a few years lapsed before the new [[Grand Seiko]] line was introduced. This started in [[1988]] with a line of quartz watches that can be seen as a continuation of the Grand Quartz.
+===== Models =====
+  * [[Seiko 48|48GQ 4840/4842/4843]] (1975-1978) Suwa - 10 or 15 seconds per month
+  * [[Seiko 99|99GQ 9940/9942/9943]] (1978-1985) Suwa - Twin Quartz, 10 seconds per year
+  * [[Seiko 92|92GQ 9256]] (1978-1980) Daini - Twin Quartz, 10 seconds per year
+{{tag>Seiko}}