Seiko Cal. 6640 - 761

This Solar model from 1990 features a 42mm Titanium case. Powered by the 6640 caliber with 24j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-d5d340706d40]

Also known as: Rally

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Burgundy

Jewels

24j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1990

Related Models

• Seiko 7043-257
• Seiko 3863-755
• Seiko 7017-247
• Seiko 7060-770
• Seiko 7110-842
• Seiko 5249-906
• Seiko 5650-613
• Seiko 7183-278
• Seiko 6197-577
• Seiko 5657-471
• Seiko 5635-533
• Seiko 6357-108