Seiko Cal. 4492 - 509

This Spring Drive model from 1975 features a 40mm Gold-Plated case. Powered by the 4492 caliber with 32j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-a7698da28d9a]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

32j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1975

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