First machine, singer 2282 second hand (inactive for 3 years), top thread visible on back no matter the top tension. Already checked: correctly threaded (thread goes through tension disks), bobbin tension is
Maquinas de coser de brazo libre Singer Tradition 2282
Швейная машина Singer Tradition 2282 - купить в интернет-магазине.
Singer Tradition 2282 Sewing machine | Back Market