Seiko Cal. 5231 - 822

This Spring Drive model from 1978 features a 40mm Hardlex-Coated Steel case. It features a White dial protected by a Acrylic crystal and offers 120m of water resistance. [seikata-wm-6e494e30bd74]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1978

Related Models

• Seiko 0782-132
• Seiko 6384-561
• Seiko 6685-428
• Seiko 5226-439
• Seiko 5228-684
• Seiko 0723-700
• Seiko 7160-961
• Seiko 6188-874
• Seiko 0738-293
• Seiko 6177-865
• Seiko 7126-626
• Seiko 5216-346