Seiko Cal. 6638 - 210

The 6638-210 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 29j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-4806ff87b994]

Also known as: Sumo, Panda

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1968

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