Seiko Cal. 6187 - 646

The 6187-646 is a sought-after Solar piece from Seiko's golden era. Powered by the 6187 caliber with 29j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-6aeb89ad5491]

Also known as: Monster, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

38mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Cream

Jewels

29j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1976

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