Seiko Cal. 7027 - 423

This Spring Drive model from 1971 features a 46mm Two-Tone case. It features a Silver dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-239c8617fdb3]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1971

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