Seiko Cal. 6687 - 139

The 6687-139 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6687 caliber with 21j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-39db80ad8ee2]

Also known as: Bullhead, World Timer

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1998

Related Models

• Seiko 5650-167
• Seiko 3894-429
• Seiko 5240-500
• Seiko 5219-161
• Seiko 0710-279
• Seiko 6281-809
• Seiko 0718-872
• Seiko 7069-137
• Seiko 4542-531
• Seiko 5218-348
• Seiko 5214-510
• Seiko 4562-565