Cal. 4S29 is a hand-winding movement with small seconds and power reserve indicator produced by Seiko in the 2000s. It was part of the second “wave” of movements in the Seiko 4S family, which itself was derived from the historic Seiko 52 stream of movements. Cal. 4S29 is similar in design to Cal. 4S79, though it lacks two jewels as well as the upscale finishing and regulation of that movement.
The movement has an unusual look thanks to its complications: It has small seconds at 6:00 and a retrograde power reserve indicator at 9:30. This shows the 40 hour power reserve.
The only known watch to use Cal. 4S29 was the Seiko Brightz Mechanical Retrograde, catalog number SAGN005. This watch is only listed in Seiko catalogs from 2003 through 2007. The rest of the SAGN series used Cal. 4S15 (SAGN001) or Cal. 4S27.
Complicated Seiko 4S Movements
After 2000, Seiko had more diverse mechanical movements to choose from. The 4S family was moved upmarket as a base for modules to use in complicated upscale watches. The last 4S movement was retired in 2015.
| Production | Watch | Winding | Jewels | Notes | |
|---|---|---|---|---|---|
| 4S27 | 2003-2007 | SAGN | Automatic | 28 | Retrograde day at 2:00 Date pointer at 6:00 GMT subdial at 9:00 |
| 4S29 | 2003-2007 | SAGN | Manual | 29 | Small seconds at 6:00 Retrograde power at 9:00 |
| 4S36 | 2007-2013 | SAEN SARN | Automatic | 31 | Independent 24 hour hand Retrograde day at 2:00 Date pointer at 6:00 Retrograde power at 9:00 |
| 4S76 | 2004-2010 | GBBT GCBT | Automatic | 31 | Independent 24 hour hand Retrograde day at 2:00 Date pointer at 6:00 Retrograde power at 9:00 |
| 4S77 | 1996? 2000-2005 | GCBG | Automatic | 28 | Retrograde day at 2:00 Date pointer at 6:00 GMT subdial at 9:00 |
| 4S79 | 1998-2015 | GBAY GCAY | Manual | 31 | Small seconds at 6:00 Retrograde power at 9:00 |