Seiko Cal. 4576 - 621

The 4576-621 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4576 caliber with 20j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-17230e85492b]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1969

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