Seiko Cal. 5641 - 887

The 5641-887 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5641 caliber with 26j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-6a3951b091ef]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

26j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1984

Related Models

• Seiko 6154-215
• Seiko 7094-688
• Seiko 6235-531
• Seiko 5234-580
• Seiko 4445-130
• Seiko 5650-181
• Seiko 4472-939
• Seiko 3875-846
• Seiko 4599-265
• Seiko 0755-368
• Seiko 4475-243
• Seiko 6285-402