Seiko Cal. 7121 - 387

The Seiko 7121-387 represents an important milestone in Seiko's 1987 lineup. It features a Black dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-4e25cf0db8c4]

Also known as: Bellmatic, Crown

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1987

Related Models

• Seiko 6271-625
• Seiko 6321-159
• Seiko 0748-231
• Seiko 7082-647
• Seiko 3814-328
• Seiko 5213-281
• Seiko 5658-940
• Seiko 7120-417
• Seiko 5280-623
• Seiko 4588-734
• Seiko 4581-454
• Seiko 7129-683