Seiko Cal. 6637 - 504

The 6637-504 is a sought-after Solar piece from Seiko's golden era. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-ca825305ba61]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1975

Related Models

• Seiko 6688-325
• Seiko 7030-230
• Seiko 6659-235
• Seiko 6623-447
• Seiko 5244-777
• Seiko 6371-626
• Seiko 7118-420
• Seiko 4597-522
• Seiko 0745-955
• Seiko 7085-113
• Seiko 0794-141
• Seiko 7055-387