Seiko Cal. 6381 - 425

This Hand-Winding model from 1968 features a 46mm Titanium case. Powered by the 6381 caliber with 27j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-a03118a50356]

Also known as: Tuna, Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Silver

Jewels

27j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1968

Related Models

• Seiko 4518-854
• Seiko 6665-284
• Seiko 6322-728
• Seiko 5641-972
• Seiko 7123-237
• Seiko 6279-417
• Seiko 6238-521
• Seiko 6166-246
• Seiko 6320-294
• Seiko 6390-305
• Seiko 6135-529
• Seiko 4463-335