Vintage Queen and Princess Embroidery Hoops || Two Size 。Vintage lot of wooden embroidery hoops, Princess. Design: These hoops are characterized by a bow spring tension mechanism, often made of nickel-plated steel, which helps keep fabric taut. Age: Produced primarily from the 1910s through the 1950s. Markings: Authentic vintage pieces are often stamped with \"Princess Pat\'d Adjustable Spring\" or \"Princess Made in USA\". Variety: They were made in various sizes, commonly ranging from 4 to 8 inches in diameter. Availability While they are no longer in mass production, they are considered rare craft supplies and are frequently available through vintage resellers. Made in the USA Gibbs Manufacturing Co. Canton, Ohio