Seiko Cal. 6645 - 437

The 6645-437 is a sought-after Solar piece from Seiko's golden era. Powered by the 6645 caliber with 31j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-f54a2c71c940]

Also known as: Samurai, Flighty

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1975

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