Seiko Cal. 6637 - 479

The 6637-479 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6637 caliber with 27j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-21561a2608ef]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

27j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1989

Related Models

• Seiko 7190-377
• Seiko 3825-247
• Seiko 4468-433
• Seiko 6688-332
• Seiko 6311-513
• Seiko 5249-934
• Seiko 0784-941
• Seiko 6343-861
• Seiko 6620-240
• Seiko 7060-104
• Seiko 6126-968
• Seiko 6183-641