Seiko Cal. 5661 - 571

The 5661-571 is a sought-after Automatic piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-9c63fbc6608e]

Also known as: Monster, Bellmatic

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

46mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1991

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