Seiko Cal. 7178 - 521

Released in 1979, the Cal. 7178 with design code 521 was part of Seiko's domestic market collection. It features a Silver dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-100fede55ec2]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1979

Related Models

• Seiko 3871-354
• Seiko 5656-970
• Seiko 6647-950
• Seiko 6169-741
• Seiko 7087-105
• Seiko 6324-140
• Seiko 6688-524
• Seiko 7199-439
• Seiko 4498-199
• Seiko 5223-271
• Seiko 6670-958
• Seiko 3853-878