1981-Seiko-Catalog.V2, page 47
EQD900
Reference unconfirmed — this watch’s caseback number has not been confirmed yet.
referencereference unconfirmed
collection—
caliber400
year1981
movementAutomatic
dial colourChampagne
case colourGold
case shapeRectangular
strapBracelet
jewels—
family years1960-1969
factorySuwa
size mm28
beat aph18000
jewels options17, 18, 28, 39
used inSeikomatic, “daters”,
movement descautomatic
movement typeautomatic
production start1963
sub brandsWeekdater, Seikomatic Day