Seiko Cal. 6623 - 931

The Seiko 6623-931 represents an important milestone in Seiko's 1975 lineup. It features a Silver dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-185b8d7585bc]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1975

Related Models

• Seiko 6246-637
• Seiko 0721-812
• Seiko 6152-361
• Seiko 4560-499
• Seiko 6335-379
• Seiko 6183-210
• Seiko 5287-666
• Seiko 5232-812
• Seiko 6368-820
• Seiko 6337-604
• Seiko 6665-196
• Seiko 5648-523