Seiko Cal. 6375 - 221

The Seiko 6375-221 represents an important milestone in Seiko's 1965 lineup. Powered by the 6375 caliber with 28j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-b9ac1d29db2c]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1965

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