Seiko Cal. 4498 - 631

The 4498-631 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4498 caliber with 34j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-4124c37caf6e]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

34j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1965

Related Models

• Seiko 6361-812
• Seiko 6384-535
• Seiko 7087-837
• Seiko 6181-684
• Seiko 7144-894
• Seiko 4480-146
• Seiko 5656-652
• Seiko 5696-290
• Seiko 5686-897
• Seiko 5297-589
• Seiko 0717-139
• Seiko 6290-318