Seiko Cal. 6613 - 391

The 6613-391 is a sought-after Hand-Winding piece from Seiko's golden era. The Inner Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-3e0690be211a]

Also known as: Bullhead, Emperor

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1999

Related Models

• Seiko 0723-529
• Seiko 4423-170
• Seiko 7187-156
• Seiko 7068-654
• Seiko 7013-316
• Seiko 4429-964
• Seiko 5630-380
• Seiko 3826-711
• Seiko 0799-937
• Seiko 4535-858
• Seiko 0769-348
• Seiko 6220-894