Seiko Cal. 6331 - 397

Seiko 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

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