Seiko Cal. 7183 - 398

The Seiko 7183-398 represents an important milestone in Seiko's 1973 lineup. Powered by the 7183 caliber with 20j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-e58c89eac9d5]

Also known as: Tuna, Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1973

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