Seiko Cal. 4423 - 651

The 4423-651 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4423 caliber with 32j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-4259c1299245]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1984

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