Seiko Cal. 6378 - 385

This Spring Drive model from 1968 features a 41mm PVD Black case. The Coin-Edge bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-78ec03f30b7e]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Black

Jewels

35j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1968

Related Models

• Seiko 6120-601
• Seiko 3854-355
• Seiko 6625-133
• Seiko 5698-429
• Seiko 4447-209
• Seiko 6219-301
• Seiko 6160-456
• Seiko 4454-767
• Seiko 7099-690
• Seiko 5644-873
• Seiko 6620-353
• Seiko 4575-782