Seiko Cal. 6616 - 402

This Hand-Winding model from 1977 features a 44mm Titanium case. Powered by the 6616 caliber with 28j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-095dcc7ed647]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1977

Related Models

• Seiko 7039-178
• Seiko 6629-990
• Seiko 7177-423
• Seiko 7043-948
• Seiko 4410-884
• Seiko 7013-704
• Seiko 5242-940
• Seiko 6671-595
• Seiko 5659-817
• Seiko 4477-397
• Seiko 4592-374
• Seiko 6138-231