Seiko Cal. 4425 - 375

This Spring Drive model from 1975 features a 36mm PVD Black case. Powered by the 4425 caliber with 17j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-47eacb9bc394]

Also known as: UFO, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

17j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1975

Related Models

• Seiko 6198-261
• Seiko 6165-792
• Seiko 3817-966
• Seiko 6289-221
• Seiko 4451-833
• Seiko 4410-155
• Seiko 6121-139
• Seiko 6290-129
• Seiko 4496-661
• Seiko 6190-148
• Seiko 5637-632
• Seiko 7198-973