Seiko Cal. 6644 - 757

This Solar model from 1968 features a 37mm PVD Black case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-c96b1a38e1eb]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1968

Related Models

• Seiko 6210-129
• Seiko 4458-449
• Seiko 6125-889
• Seiko 5240-145
• Seiko 6199-485
• Seiko 5238-334
• Seiko 5688-553
• Seiko 7025-236
• Seiko 4473-855
• Seiko 6657-245
• Seiko 6316-308
• Seiko 4523-744