Seiko 8L35

	Brand:	Seiko, Shizukuishi Watch Studio
	Family:	Seiko 9S5x Family
	Height:
	Jewels:	26
	Reserve:	50 hours
	Frequency:	28,800 A/h
	Winding:	Automatic, Bi-Directional Automatic Winding, Seiko Magic Lever Winding
	Diameter:
© Seiko This 2011 image shows Cal. 8L35 in Brightz Phoenix finish	Complications:	Date, Hand Winding, Quick Date Correction
	Hands:	Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Window at 3:00

Distinguishing Technical Characteristics
Clockwise Balance Cock Screw Regulator Balance Balance at 1:30
Production: 2000 – Current
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

Cal. 8L35 is an automatic watch movement with date produced by Seiko’s Shizukuichi Watch Studio for the Brightz and Prospex brands starting 2001 and remains in production as of 2020. It was based on the Grand Seiko Cal. 9S55 which was produced at the same time but has been phased out since 2010. The Brightz Cal. 8L21 was similar but lacks the date complication.

Cal. 8L35 was first used in the Prospex Marine Master Pro SBDX line in 2000 and remains in use as of 2020. Note that the Prospex SLA is simply a different model numbering system and these watches also have SBDX numbers. From 2010 through 2013 it was also used in the Brightz Phoenix SAGQ model line.

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