Seiko Cal. 6637 - 225

The 6637-225 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6637 caliber with 24j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-8ab21ab266d5]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1972

Related Models

• Seiko 6129-154
• Seiko 7141-991
• Seiko 4468-969
• Seiko 6380-439
• Seiko 7148-318
• Seiko 7187-691
• Seiko 7045-220
• Seiko 7018-634
• Seiko 5275-429
• Seiko 7031-178
• Seiko 6316-634
• Seiko 0735-395