Seiko Cal. 4525 - 646

The Seiko 4525-646 represents an important milestone in Seiko's 1975 lineup. It features a Black dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-201ef586147a]

Also known as: Navigator, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1975

Related Models

• Seiko 4572-217
• Seiko 0747-595
• Seiko 0723-423
• Seiko 0789-346
• Seiko 6341-101
• Seiko 7177-854
• Seiko 7047-618
• Seiko 5628-828
• Seiko 4469-447
• Seiko 4582-469
• Seiko 5229-687
• Seiko 7058-557