Seiko Cal. 0727 - 391

This Spring Drive model from 1966 features a 44mm Two-Tone case. It features a Navy dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-bb6301bde119]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1966

Related Models

• Seiko 6611-752
• Seiko 0763-789
• Seiko 0718-648
• Seiko 4537-509
• Seiko 4552-928
• Seiko 7026-422
• Seiko 7146-217
• Seiko 5687-799
• Seiko 6186-754
• Seiko 6214-723
• Seiko 4498-981
• Seiko 6251-814