Seiko Cal. 3891 - 720

The 3891-720 is a sought-after Quartz piece from Seiko's golden era. Powered by the 3891 caliber with 36j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-671a736d4d4d]

Also known as: Panda

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1985

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