Seiko Cal. 6310 - 644

The 6310-644 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6310 caliber with 18j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-93f4b2a75e1a]

Also known as: Shogun, UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

12.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1975

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