Seiko Cal. 6637 - 648

This Hand-Winding model from 1972 features a 39mm Stainless Steel case. It features a Burgundy dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-17ee38bcd6b3]

Also known as: Panda, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1972

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