Seiko Cal. 4540 - 278

The Seiko 4540-278 represents an important milestone in Seiko's 1986 lineup. It features a Black dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-eac7ce5c7582]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1986

Related Models

• Seiko 6320-981
• Seiko 6349-493
• Seiko 3830-926
• Seiko 6689-743
• Seiko 6321-494
• Seiko 6180-483
• Seiko 4564-692
• Seiko 4529-210
• Seiko 0723-436
• Seiko 7039-410
• Seiko 0787-794
• Seiko 7033-259