Seiko Cal. 4440 - 740

The 4440-740 is a sought-after Quartz piece from Seiko's golden era. Powered by the 4440 caliber with 21j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-9aa8dac74337]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1991

Related Models

• Seiko 4521-129
• Seiko 3865-161
• Seiko 5693-257
• Seiko 7151-468
• Seiko 5270-137
• Seiko 0799-422
• Seiko 4443-300
• Seiko 5699-202
• Seiko 5241-475
• Seiko 6383-642
• Seiko 6274-347
• Seiko 7071-386