Seiko Cal. 4515 - 631

Released in 1967, the Cal. 4515 with design code 631 was part of Seiko's domestic market collection. Powered by the 4515 caliber with 36j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-8dbd81dbd77b]

Also known as: Navigator, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1967

Related Models

• Seiko 3865-852
• Seiko 3820-674
• Seiko 4578-577
• Seiko 6164-797
• Seiko 3844-606
• Seiko 5650-241
• Seiko 5689-265
• Seiko 6387-593
• Seiko 4588-557
• Seiko 3893-639
• Seiko 6351-817
• Seiko 6276-876