Seiko Cal. 6639 - 777

The 6639-777 is a sought-after Automatic piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-d471c7c4cd85]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1988

Related Models

• Seiko 6336-547
• Seiko 4543-284
• Seiko 6145-370
• Seiko 6615-295
• Seiko 3866-263
• Seiko 5694-518
• Seiko 6673-456
• Seiko 6356-356
• Seiko 5630-207
• Seiko 6249-466
• Seiko 5267-423
• Seiko 5241-150