1973-seiko-catalog-v1-jp, page 62
547-551 — 5 Actus
Reference unconfirmed — this watch’s caseback number has not been confirmed yet.
Collectionlikely
5 Actus
An upmarket, sportier evolution within the Seiko 5 family, offering higher-beat automatic movements (often 21–23 jewels at 21,600 bph) and more adventurous 1970s case and dial designs than the base Seiko 5, targeting young buyers with faceted crystals, integrated bracelets, and bold dials. Collectors enjoy the Actus for its funky period aesthetics.
referencereference unconfirmed
collection5 Actus (likely)
caliber—
year1973
movementAutomatic
dial colourChampagne
case colourSilver
case shapeSquare
strapBracelet
jewels25