Seiko Cal. 6181 - 437

The 6181-437 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6181 caliber with 26j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-87863f751b22]

Also known as: Tuna, Panda

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1978

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