Seiko Cal. 6678 - 820

The 6678-820 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6678 caliber with 25j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-5dfc6e074254]

Also known as: Monster, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

25j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1973

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