Seiko Cal. 6650 - 623

This Hand-Winding model from 1978 features a 35mm PVD Black case. It features a White dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-6b20454ddf70]

Also known as: Tuna, Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1978

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