Seiko Cal. 3878 - 635

This Hand-Winding model from 1971 features a 37mm Gold-Plated case. Powered by the 3878 caliber with 36j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-80d76eb2198a]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Champagne

Jewels

36j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1971

Related Models

• Seiko 3882-564
• Seiko 5629-582
• Seiko 7037-448
• Seiko 0775-378
• Seiko 5252-326
• Seiko 5226-868
• Seiko 5614-995
• Seiko 6160-486
• Seiko 3856-751
• Seiko 6672-220
• Seiko 7095-327
• Seiko 6342-501