Seiko Cal. 6660 - 427

This Hand-Winding model from 1965 features a 39mm Hardlex-Coated Steel case. It features a Silver dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-2aa98bc2ed6a]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1965

Related Models

• Seiko 4514-521
• Seiko 3890-674
• Seiko 0717-818
• Seiko 5253-325
• Seiko 6298-875
• Seiko 6274-823
• Seiko 0745-334
• Seiko 5630-604
• Seiko 7038-264
• Seiko 6326-367
• Seiko 5613-431
• Seiko 6126-844