Seiko Cal. 6637 - 451

The Seiko 6637-451 represents an important milestone in Seiko's 1965 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-50e501a177c4]

Also known as: UFO, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Burgundy

Jewels

34j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1965

Related Models

• Seiko 4582-438
• Seiko 6654-926
• Seiko 5684-895
• Seiko 5243-442
• Seiko 3879-656
• Seiko 7143-832
• Seiko 6655-380
• Seiko 7167-515
• Seiko 7131-612
• Seiko 6118-422
• Seiko 6159-915
• Seiko 7138-235