Seiko Cal. 6616 - 840

This Spring Drive model from 1984 features a 46mm Titanium case. It features a White dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-c7243f28f43c]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1984

Related Models

• Seiko 4429-528
• Seiko 4455-317
• Seiko 5652-364
• Seiko 6137-982
• Seiko 0797-735
• Seiko 6191-271
• Seiko 4558-581
• Seiko 0737-651
• Seiko 7143-646
• Seiko 0740-108
• Seiko 0786-321
• Seiko 6138-562