Seiko 4S29

	Brand:	Seiko
	Family:	Seiko 4S Family
	Height:
	Jewels:	29
	Reserve:	40 hours
	Frequency:	28800 A/h
	Winding:	Hand winding
	Diameter:	25.60 mm (11.5 ligne)
	Complications:	Hacking Seconds, Hand Winding, Power Reserve Indicator
	Hands:	Central Hour Hand, Central Minute Hand, Power Reserve Pointer at 9:30, Small Seconds Hand at 6:00

Distinguishing Technical Characteristics
Hand-Winding Clockwise Balance Cock Screw Regulator Balance, Balance at 5:00
Production: 2003 – 2007
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

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.