Seiko Cal. 6637 - 730

The Seiko 6637-730 represents an important milestone in Seiko's 1973 lineup. It features a Green dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-bb2b3ebe073c]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1973

Related Models

• Seiko 4587-267
• Seiko 6649-203
• Seiko 4496-453
• Seiko 7072-422
• Seiko 6326-694
• Seiko 6668-674
• Seiko 4595-290
• Seiko 6648-206
• Seiko 6193-322
• Seiko 7079-958
• Seiko 5647-538
• Seiko 6141-452