Seiko Cal. 4581 - 737

The 4581-737 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4581 caliber with 18j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-110afd764304]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1970

Related Models

• Seiko 6256-176
• Seiko 3885-527
• Seiko 4582-858
• Seiko 5667-639
• Seiko 4430-198
• Seiko 4496-999
• Seiko 7077-282
• Seiko 3815-729
• Seiko 6366-802
• Seiko 0759-130
• Seiko 7186-222
• Seiko 6266-811