Seiko Cal. 6637 - 683

The 6637-683 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6637 caliber with 18j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-530fb26100cb]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

18j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1967

Related Models

• Seiko 6339-136
• Seiko 5663-929
• Seiko 7042-606
• Seiko 4516-331
• Seiko 4576-770
• Seiko 7169-294
• Seiko 5646-454
• Seiko 6330-726
• Seiko 5688-746
• Seiko 5223-317
• Seiko 5291-133
• Seiko 6336-742