Seiko Cal. 3851 - 261

Released in 1967, the Cal. 3851 with design code 261 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-15ebac88da74]

Also known as: Helmet, Bellmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1967

Related Models

• Seiko 6371-571
• Seiko 5240-849
• Seiko 6691-320
• Seiko 6173-667
• Seiko 7026-539
• Seiko 6163-214
• Seiko 4590-829
• Seiko 7021-198
• Seiko 6380-778
• Seiko 6643-762
• Seiko 6225-812
• Seiko 6369-805