Seiko Cal. 6643 - 537

The Seiko 6643-537 represents an important milestone in Seiko's 1977 lineup. It features a White dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-5ad205dff9c5]

Also known as: Arnie

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1977

Related Models

• Seiko 7119-359
• Seiko 4487-515
• Seiko 5275-467
• Seiko 0761-240
• Seiko 5274-521
• Seiko 0797-456
• Seiko 4463-157
• Seiko 3882-171
• Seiko 6217-189
• Seiko 5698-380
• Seiko 5243-355
• Seiko 6152-633