Seiko Cal. 6644 - 660

The Seiko 6644-660 represents an important milestone in Seiko's 1996 lineup. It features a Navy dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-279dc2f63455]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1996

Related Models

• Seiko 7114-644
• Seiko 3869-928
• Seiko 3861-316
• Seiko 6144-174
• Seiko 5264-484
• Seiko 6382-320
• Seiko 5253-777
• Seiko 7080-593
• Seiko 7139-679
• Seiko 0712-747
• Seiko 0792-206
• Seiko 4484-405