Seiko Cal. 4539 - 613

The Seiko 4539-613 represents an important milestone in Seiko's 1987 lineup. Powered by the 4539 caliber with 25j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-55864c46bb51]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

38mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1987

Related Models

• Seiko 3863-498
• Seiko 6122-464
• Seiko 5672-794
• Seiko 3831-311
• Seiko 6140-922
• Seiko 6398-833
• Seiko 7064-190
• Seiko 6359-715
• Seiko 6673-222
• Seiko 4473-712
• Seiko 3839-703
• Seiko 6633-884