Seiko Cal. 4540 - 273

Seiko 4540-273

The Seiko 4540-273 represents an important milestone in Seiko's 1977 lineup. Powered by the 4540 caliber with 23j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-ea10bc7b3df1]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
9.3mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
60m
Dial Color
Burgundy
Jewels
23j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1977

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