Seiko Cal. 6615 - 644

The 6615-644 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6615 caliber with 25j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-561e5eb4db0b]

Also known as: Goldfeather, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1970

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