Seiko Cal. 6617 - 557

The 6617-557 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6617 caliber with 22j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-feb4bc4d67fd]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

White

Jewels

22j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1979

Related Models

• Seiko 7054-895
• Seiko 7139-663
• Seiko 7068-838
• Seiko 3846-980
• Seiko 6125-407
• Seiko 7183-667
• Seiko 4418-568
• Seiko 0776-873
• Seiko 6163-875
• Seiko 6183-742
• Seiko 6365-931
• Seiko 3843-366