Seiko Cal. 6648 - 422

The 6648-422 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6648 caliber with 30j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-f1856d023bd7]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Champagne

Jewels

30j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1969

Related Models

• Seiko 6645-603
• Seiko 3836-308
• Seiko 4515-532
• Seiko 5252-938
• Seiko 3896-374
• Seiko 6270-971
• Seiko 0771-442
• Seiko 6294-342
• Seiko 0738-528
• Seiko 7065-718
• Seiko 5616-966
• Seiko 4525-742