Seiko Cal. 6331 - 397

The 6331-397 is a sought-after Solar piece from Seiko's golden era. Powered by the 6331 caliber with 23j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-832f6676bc03]

Also known as: Bellmatic, Arnie

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1975

Related Models

• Seiko 6150-599
• Seiko 6351-485
• Seiko 3879-377
• Seiko 6298-565
• Seiko 6697-665
• Seiko 7129-668
• Seiko 4439-567
• Seiko 6654-561
• Seiko 4563-432
• Seiko 6117-389
• Seiko 4528-207
• Seiko 4478-965