Differences

This shows you the differences between two versions of the page.

--- seiko_7000 [02.12.2022 20:38] – created - external edit 127.0.0.1
+++ seiko_7000 [03.12.2022 10:48] (current) – [Seiko 7000] gerdlothar
@@ Line 1: / Line 1: @@
+====== Seiko 7000 ======
+{{wst>author|[[Foskett, Stephen|Stephen Foskett]] ([[https://grail-watch.com/|Grail Watch]])}}
+The **7000** series was a family of mid-range mechanical watch movements from [[Seiko]] from the 1970's through the 1990's.
+Produced from [[1973]], the 7000 family was a midrange mechanical offering. It was the basis for the popular [[Seiko 7S26|7S26]] family, and its descendants remain in production today. The family operated at the same 21,600 A/h still used by midrange Seiko mechanisms and all offered 43 hours of power reserve. All members of the family feature Seiko's bi-directional [[Magic Lever]] winding system.
+There were three versions of the 7000 family before the introduction of the [[Seiko 7S26|7S26]] with its new [[quickset]] day and date mechanism and other improvements
+  - The original **7005/7006/7025** movements appeared in the early 1970's; had [[quickset]] date but not day
+  - The line expanded to include cam switching modular [[chronograph]]s with the **7015/7016/7017/7018**; quickset day by pushing the crown
+  - The line was resurrected in the 1980's as the **7001/7002/7009/7019/7039**
+The 7005 and 7006 (date only and day/date respectively) designs were re-used and updated in the 1980's as the 7002 and 7009. These later movements were optimized for price and mechanized production, using many more stamped steel and plastic parts. Although they have proven fairly robust, their accuracy has suffered due to this change.
+^Generation ^Model ^Year ^Jewels ^Height ^Complications ^
+|New date mechanism |7005A |1969-1979 |17 |4.5 mm |Date |
+|:::|7006A |1970-1981 | 17/19/21 |4.85 mm |Day, date |
+|:::|7025A |1976-1986 | | |Date, small rotor |
+|Chronographs |7015A\\ 7017A |1970-1980\\ 1971-1981 |21 |5.9 mm |Day, date, chronograph 60s |
+|:::|7016A |1972-1982 |21 |6.4 mm |Day, date, chronograph 60s, 30min, 12h |
+|:::|7018A, 7018B |1971-1981 |23 |5.9 mm |Day, date, chronograph 60s, 30min |
+|Push-date |7009A |1976-1998 |17 |5.0 mm |Day, date |
+|:::|7019A\\ 7039A |1969-1979\\ 1974-1999 |21 |5.0 mm |Day, date |
+|Divers |7001A |1988-1999 |17 |4.9 mm | |
+|:::|7002A |1988-1999 |17 |4.9 mm |Date |
+===== External Links =====
+  * [[http://people.timezone.com/msandler/Articles/Workbench/Seiko/Seiko7005.html|What Drives a Workhorse: Servicing a Seiko 7005]]
+<WRAP ud ud_mov>
+**Description:**
+  * [[Automatic]] movement
+  * [[Kif]]-[[Duofix]] escapement settings
+**Functions:**
+  * Hours, minutes, [[central seconds]]
+  * Optional day and date
+**Data:**
+  * Diameter 12 ligne (27 mm)
+  * 17, 19, 21, or 23 [[jewels]]
+  * 18,000 A/h
+  * Power reserve 43 Hours
+**Production period:**
+  * [[1961]]-
+</WRAP>
+{{tag>Movements Automatic_movements Automatic_chronograph_movements Seiko_calibres Daini_Seikosha_calibres Magic_Lever_movements}}