Seiko Cal. 3897 - 275

Seiko 3897-275

The Seiko 3897-275 represents an important milestone in Seiko's 1975 lineup. Powered by the 3897 caliber with 21j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-99107447912b]

Also known as: Monster, Helmet

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
11.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
170m
Dial Color
Black
Jewels
21j
Frequency
36,000 bph
Power Reserve
50 hours
Year
1975

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seikata-wm-99107447912b