Seiko Cal. 5637 - 991

The 5637-991 is a sought-after Solar piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-0df0b04c475c]

Also known as: Panda

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1981

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