Seiko Cal. 4456 - 620

This Spring Drive model from 1978 features a 44mm PVD Black case. Powered by the 4456 caliber with 31j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-fc6816838c59]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1978

Related Models

• Seiko 5236-443
• Seiko 6636-484
• Seiko 4446-219
• Seiko 6262-825
• Seiko 3817-409
• Seiko 0734-154
• Seiko 4434-644
• Seiko 7173-558
• Seiko 7098-974
• Seiko 6277-258
• Seiko 3869-182
• Seiko 7123-581