Seiko Cal. 6630 - 240

This Hand-Winding model from 1978 features a 35mm Two-Tone case. With its 20mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-76d997fef2d0]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Champagne

Jewels

33j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1978

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