Seiko Cal. 5640 - 525

The 5640-525 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Green dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-fcc924ed4a57]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1987

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