Seiko Cal. 6310 - 563

This Spring Drive model from 1969 features a 36mm Two-Tone case. Powered by the 6310 caliber with 35j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-f907b6db41f6]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1969

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