Seiko Cal. 6637 - 818

Seiko 6637-818

This Automatic model from 1987 features a 36mm Two-Tone case. Powered by the 6637 caliber with 24j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-20b6483cbfb0]

Also known as: Bullhead, Baby Tuna

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
36mm
Case Thickness
11.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Cream
Jewels
24j
Frequency
36,000 bph
Power Reserve
71 hours
Year
1987

Related Models

seikata-wm-20b6483cbfb0