Seiko Cal. 6388 - 436

Released in 1975, the Cal. 6388 with design code 436 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-a11ae4ceb225]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1975

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