Seiko Cal. 6645 - 648

Released in 1970, the Cal. 6645 with design code 648 was part of Seiko's domestic market collection. It features a Cream dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-58c1dac96d4d]

Also known as: Monster, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

36j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1970

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