This is a beautiful and highly sought-after vintage Singer Automatic Buttonholer, Model 160506, complete with its original green oval "pod" case. A fantastic accessory for collectors and owners of vintage Singer sewing machines, this is the classic metal-bodied buttonholer from the mid-20th century, known for its quality and durability. Condition: This buttonholer is in excellent vintage condition. The metal body is clean, with minimal cosmetic wear. All moving parts appear to be functional and the unit is ready to be used. The green plastic case is also in good shape with no cracks or major damage, though it has some light scuffs and marks consistent with its age. Please examine all photos carefully as they are part of the description. What's Included: Metal-Bodied Singer Buttonholer Unit (Model 160506) Original Green Oval "Pod" Case with "SINGER" logo Metal Feed Dog Cover (essential for proper operation) Base Plate with U.S. Patent Numbers Templates (A full set is believed to be present inside the case, please see photos) Compatibility: This is a genuine low-shank attachment and is compatible with a wide variety of vintage Singer sewing machines, including: Singer Featherweight 221 and 222 Singer 15, 66, 99, 128, 201, 306, 319, and 403 Many other low-shank domestic sewing machines Why Buy This Model? This particular model is a collector's favorite due to its iconic "Atomic Era" design and durable metal construction. It provides professional-looking buttonholes and is a must-have for anyone who appreciates the quality and craftsmanship of classic sewing accessories. Please ask any questions you may have before purchasing. This item is sold as-is.