Seiko 4S & 8L Brightz Family (SAGN005 SAGN007 SAGL001 SAGL005 SAGM007)

This Christmas Eve I had a very special treat. A fellow collector allowed me to borrow his collection of Brightz watches in order to do a photo review. Together with my own Brightz, I believe this is almost the complete … Continue reading

Seiko Mechanical SARN001 – GMT Time Traveller (4S36)

Synchronicity works in mysterious ways, much like how life unfolds. Life almost never turns out as planned, yet the outcome can be somewhat surprising. This is especially true for watch collectors, like myself, where we encounter in forums/blogs/news about certain … Continue reading

Seiko Credor Phoenix GCBR993 – The Resurrection of Quality Seiko Mechanicals

In Greek mythology, a phoenix or phenix (Ancient Greek φοίνιξ phóinīx) is a long-lived bird that is cyclically regenerated or reborn. Associated with thesun, a phoenix obtains new life by arising from the ashes of its predecessor. The phoenix was subsequently adopted as a symbol in Early Christianity. While the … Continue reading

Present day Seiko movement tree

Was reading an excellent post at Watcharama a few days back on the newer 4R movement and how they have evolved from the humble 7s movement, and I decided to do up a movement tree to illustrate the beginnings of some of the popular current day Seiko movements (simple 3 hand variants). The movements include the 7S, 4R, 6R, 4S, 8L and 9S movements, which are all still in production today, except for the 4S, which is now only available with complications. The simple 3 hand 4S15/25/35 movements are no longer in production. The list is obviously not complete, as I had to leave out some movements, including all the chronograph movements (6S and 8R family), but otherwise it is pretty much complete. 6s chronograph is derived from the 4S family, while the 8S chronograph is derived from the 7S family.  I have left out all the variants with complications such as GMT, retrograde, power reserve, etc. Quartz, Kinetic and Solar movements are also left out. References from where I got the information can be found at the bottom of this post. Without the information shared by the respective authors of the various posts, I would not have been able to compile this illustration with such ease. Image References:

http://watcharama.com/the-seiko-4r36-family-in-brief/

http://people.timezone.com/library/cjrml/cjrml0024

http://yeomanseiko.com/2009/10/26/grand-seiko-gmt-automatic/#more-599

http://www.seiyajapan.com/pages/the-history-of-grand-seiko

http://www.timekeeper.co.nz/viewtopic.php?f=20&t=763

http://people.timezone.com/msandler/Articles/Workbench/Seiko/Seiko7005.html