Seiko Cal. 5630 - 740

The 5630-740 is a sought-after Quartz piece from Seiko's golden era. With its 21mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-98ea5bdbe1c6]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1973

Related Models

• Seiko 5657-952
• Seiko 3885-312
• Seiko 4438-775
• Seiko 5622-899
• Seiko 6170-363
• Seiko 5674-302
• Seiko 4489-173
• Seiko 6633-863
• Seiko 5625-518
• Seiko 4565-983
• Seiko 4521-428
• Seiko 6678-286