Seiko Cal. 5241 - 378

Released in 1987, the Cal. 5241 with design code 378 was part of Seiko's domestic market collection. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-eacf3da2e7d8]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1987

Related Models

• Seiko 6343-524
• Seiko 0714-428
• Seiko 6150-551
• Seiko 4494-162
• Seiko 6136-563
• Seiko 6185-226
• Seiko 6667-197
• Seiko 6158-774
• Seiko 4414-459
• Seiko 6691-614
• Seiko 5212-887
• Seiko 4523-106