Seiko Cal. 6637 - 192

The 6637-192 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-55a61c06a6eb]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

35j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1994

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