Seiko 6R27

	Brand:	Seiko, Seiko Instruments Inc.
	Family:	Seiko 6R Family
	Height:	5.32 mm
	Jewels:	29
	Reserve:	45 hours
	Frequency:	28,800 A/h
	Winding:	Automatic, Bi-Directional Automatic Winding, Central Rotor Automatic Winding
	Diameter:	27.40 mm (12 ligne)
© Seiko Seiko Presage SARW051 with Cal. 6R27C	Complications:	Date, Date by Pointer, Power Reserve Indicator, Quick Date Correction
	Hands:	Central Hour Hand, Central Minute Hand, Central Seconds Hand, Date Pointer at 6:00, Power Reserve Pointer at 9:00

Distinguishing Technical Characteristics
Central-Rotor Automatic Counter-Clockwise Balance Cock Etachron Regulator Balance, Balance at 3:00
Production: 2013 – 2016
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

Seiko Cal. 6R27 is a midrange automatic movement produced by Seiko Instruments Inc. (SII) for Seiko watches. Like other Seiko 6R movements, it is more refined and accurate than the related Seiko 4R series and uses a Spron 510 mainspring. Unlike Cal. 6R15, it is a “Hi-Beat” movement operating at 28,800 A/h and has complications: Date subdial at 6:00 and retrograde power reserve at 9:00. The SARW005 Laurel tribute lacks the central seconds hand of all other 6R movements.

According to Seiko documents, this is a modular movement based on Cal. 6R15 but with a Hi-Beat balance.

Seiko 6R27 Applications

Cal. 6R27 was only used in a few watches. As of 2020 it is found in 3 models.

• 2013 SARW005 – 100th anniversary Laurel tribute
• 2016 SARW027 – 60th Anniversary Presage (limited to 1956 examples)
• Seiko Presage SPB045, SPB091
• Seiko Presage Arita Porcelain Dial SPB093

External Link

External Link