The term refers to a specific vintage sewing machine model manufactured by the Singer company. Characterized by its unique red eye tension control system, these machines were particularly popular during a specific era and are often sought after by collectors and enthusiasts for their durability and distinctive aesthetic. A prime example can be found in the 401A model.
These machines represent a significant period in Singer’s history, showcasing the company’s innovative engineering and design. The robust construction and precise stitching capabilities made these machines workhorses for both home and professional sewing, contributing to their enduring popularity. Their collectability stems from a combination of historical significance, mechanical reliability, and distinctive visual appeal.