Seiko Cal. 6638 - 300

The 6638-300 is a sought-after Solar piece from Seiko's golden era. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-b00b2acd9ec7]

Also known as: Bullhead, World Timer

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Champagne

Jewels

34j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1973

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