Seiko Cal. 5240 - 412

The Seiko 5240-412 represents an important milestone in Seiko's 1981 lineup. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-db3db2efd302]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1981

Related Models

• Seiko 6376-170
• Seiko 6252-924
• Seiko 0777-114
• Seiko 5640-880
• Seiko 6130-247
• Seiko 3857-364
• Seiko 3848-664
• Seiko 6154-195
• Seiko 5653-768
• Seiko 4436-279
• Seiko 5652-417
• Seiko 6248-349