Imperial sewing machine model 535, as illustrated in the user manual. May also be branded as New Home 535 or Janome 535.
Since I became the custodian of my Imperial 535 sewing machine I have been looking for a user manual. Many people have written in looking for the same. As luck would have it, Gord Bestwick of British Columbia, Canada happened upon my blog page and has kindly cleaned up and offered me an electronic version of his user manual, for free non-commercial distribution. This means no one need pay for this manual and all Imperial, New Home and Janome 535 owners can enjoy it. This manual is applicable to many Japanese sewing machines of similar era. Between us, the world is a better sewing place.