Help with choosing a semi heavy duty vintage sewing machine! OR for a similar price should I buy a new singer "heavy duty" would it be as capable as these old machines
MAQUINA DE COSER SEMI INDUSTRIAL SINGER (7640) AUTOMATICA
Singer Semi Industrial 4423 - Singer Argentina
The Vintage Singer Sewing Machine Blog: The Difference Between Domestic & Industrial Sewing Machines (or, How Not to Get Swindled on eBay & Craigslist)
Máquina de Coser Singer Heavy Duty Semi Industrial S-4423 - YouTube
Máquina de coser Singer semi industrial 4423 - Mundo Costura