Seiko Cal. 4521 - 677

The 4521-677 is a sought-after Solar piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-5c2cac4abeec]

Also known as: Crown

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

60m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1970

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