Seiko - Blue Ribbon Dial - 1977

Technical data :
brand: Seiko
year: 1977
movement: quartz 
function: date, day (English and Kanji)
case material: steel
case back material: steel 
case dimensions excluding crown: 36.2mm
case dimensions with crown: 37.7mm
dimensions horn to horn: 40.6mm
thickness (crystal included): 9.9mm
dimensions between lugs: 17mm
bracelet: original steel - possibility of leather strap
buckle: original steel
crystal crystal : mineral (condition: 9/10)
water-resistant: no
box: optional
paper : no
document: professional invoice