Seiko Cal. 6638 - 971

The 6638-971 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6638 caliber with 22j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-86d29c1a4865]

Also known as: Monster, Arnie

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1967

Related Models

• Seiko 4579-610
• Seiko 7024-925
• Seiko 3866-687
• Seiko 4443-900
• Seiko 4514-110
• Seiko 6244-289
• Seiko 6248-244
• Seiko 0727-298
• Seiko 5616-765
• Seiko 3882-861
• Seiko 7037-305
• Seiko 4419-748