Seiko Cal. 6645 - 230

Released in 1975, the Cal. 6645 with design code 230 was part of Seiko's domestic market collection. Powered by the 6645 caliber with 19j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-805cabee72bf]

Also known as: Tuna, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1975

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