Seiko Cal. 4542 - 640

This Spring Drive model from 1972 features a 36mm PVD Black case. Powered by the 4542 caliber with 33j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-c5775021c08d]

Also known as: Turtle, Silverwave

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1972

Related Models

• Seiko 6245-290
• Seiko 5641-887
• Seiko 7054-676
• Seiko 7151-995
• Seiko 3845-356
• Seiko 0742-554
• Seiko 6679-578
• Seiko 6176-300
• Seiko 6182-965
• Seiko 5625-296
• Seiko 6362-603
• Seiko 6399-119