Seiko Cal. 7180 - 640

Released in 1998, the Cal. 7180 with design code 640 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-dd19032ce629]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1998

Related Models

• Seiko 5267-856
• Seiko 3874-964
• Seiko 6125-561
• Seiko 5267-548
• Seiko 5248-871
• Seiko 5287-733
• Seiko 4437-240
• Seiko 6247-297
• Seiko 7193-392
• Seiko 7126-245
• Seiko 0796-848
• Seiko 6152-731