Seiko Cal. 6638 - 836

The 6638-836 is a sought-after Automatic piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-2fdc1ffd4f5b]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1999

Related Models

• Seiko 7164-413
• Seiko 6155-731
• Seiko 5269-753
• Seiko 4471-644
• Seiko 6611-149
• Seiko 3844-886
• Seiko 7191-954
• Seiko 6646-540
• Seiko 6182-183
• Seiko 3823-622
• Seiko 5290-469
• Seiko 0773-414