Seiko Cal. 5240 - 631

Seiko 5240-631

This Automatic model from 1971 features a 38mm Stainless Steel case. Powered by the 5240 caliber with 35j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-5f90c4d0d7f5]

Also known as: Turtle, Crown

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
12.7mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Silver
Jewels
35j
Frequency
36,000 bph
Power Reserve
37 hours
Year
1971

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