Seiko Cal. 4416 - 731

The 4416-731 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4416 caliber with 22j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-41ca443bb4a5]

Also known as: Panda, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1969

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