Seiko Cal. 3840 - 729

This Automatic model from 1975 features a 42mm Two-Tone case. With its 18mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-1c4a508c6800]

Also known as: UFO, Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1975

Related Models

• Seiko 0776-194
• Seiko 6660-619
• Seiko 6318-503
• Seiko 7195-692
• Seiko 6234-695
• Seiko 4517-824
• Seiko 6636-123
• Seiko 5218-552
• Seiko 6266-444
• Seiko 7024-949
• Seiko 3891-940
• Seiko 6218-718