Seiko Cal. 6637 - 998

Released in 1987, the Cal. 6637 with design code 998 was part of Seiko's domestic market collection. With its 18mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-8dcfe4ba9242]

Also known as: Turtle, Shogun

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1987

Related Models

• Seiko 5675-293
• Seiko 6392-169
• Seiko 7111-806
• Seiko 4472-843
• Seiko 7078-741
• Seiko 7029-192
• Seiko 6386-611
• Seiko 6252-792
• Seiko 7130-857
• Seiko 7053-935
• Seiko 7163-620
• Seiko 6196-600