Seiko Cal. 6657 - 444

The 6657-444 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6657 caliber with 35j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-54c492843afb]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

14.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1969

Related Models

• Seiko 3819-688
• Seiko 7087-131
• Seiko 5666-978
• Seiko 5621-924
• Seiko 3887-472
• Seiko 0738-153
• Seiko 5244-364
• Seiko 7017-622
• Seiko 6337-234
• Seiko 7129-367
• Seiko 6141-448
• Seiko 4445-623