Seiko Cal. 6687 - 991

Released in 1989, the Cal. 6687 with design code 991 was part of Seiko's domestic market collection. It features a Green dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-10024e2bf2db]

Also known as: Panda, Helmet

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1989

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