Seiko Cal. 5641 - 263

The 5641-263 is a sought-after Solar piece from Seiko's golden era. Powered by the 5641 caliber with 25j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-0d89063438d9]

Also known as: Tuna, Crown

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1977

Related Models

• Seiko 4478-635
• Seiko 4455-865
• Seiko 6382-458
• Seiko 6622-778
• Seiko 7043-499
• Seiko 4430-653
• Seiko 6625-242
• Seiko 6639-635
• Seiko 4571-216
• Seiko 6687-355
• Seiko 5245-651
• Seiko 4432-365