Seiko Cal. 6646 - 250

The 6646-250 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6646 caliber with 24j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-0c6a63f069ec]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1985

Related Models

• Seiko 5696-544
• Seiko 4555-336
• Seiko 0710-680
• Seiko 5644-307
• Seiko 7148-716
• Seiko 6190-189
• Seiko 3823-153
• Seiko 6339-658
• Seiko 3867-693
• Seiko 6326-171
• Seiko 7171-212
• Seiko 6241-161