Seiko Cal. 4442 - 398

The Seiko 4442-398 represents an important milestone in Seiko's 1965 lineup. Powered by the 4442 caliber with 23j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-049370efa674]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1965

Related Models

• Seiko 6188-295
• Seiko 6158-451
• Seiko 4423-871
• Seiko 6252-755
• Seiko 6281-152
• Seiko 5237-498
• Seiko 3840-537
• Seiko 5664-669
• Seiko 6369-133
• Seiko 4477-693
• Seiko 0786-780
• Seiko 6396-835