Seiko Cal. 6633 - 161

The 6633-161 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6633 caliber with 23j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-34294d5b8af0]

Also known as: Bellmatic, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1966

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