Seiko Cal. 5240 - 501

The 5240-501 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-e4071a8c5fa5]

Also known as: Navigator, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1965

Related Models

• Seiko 7143-400
• Seiko 5676-691
• Seiko 4579-183
• Seiko 6140-261
• Seiko 3863-654
• Seiko 7072-721
• Seiko 5620-780
• Seiko 6644-443
• Seiko 6131-897
• Seiko 6698-476
• Seiko 3818-765
• Seiko 5659-166