This Sale is For One (1) Vintage Singer Sewing Machine Singer Model 301 - Stitch Type 301 October 1952 ~ Grand Introduction ~ Anderson, SC Serial # NA040444 Machine sews as intended Light works Bakelite Foot Controller works Many Accessories Included (see photos) Singer Model 301 straight stitch sewing machine has the same number as the stitch type it sews - "Stitch Type 301". The "Stitch Type 301" as defined in the United States Government Specification Booklet 751 A The 300 stitch class includes stitch types that interlock a needle and thread with a bobbin thread by the use of a hook or shuttle mechanism. Because these threads are interlocked rather than inter-looped, the 300 class is better known as the "Lockstitch" class of stitches. The most popular stitch formation in the 300 series is the 301 stitch which is often referred as a "plain stitch", "straight stitch", or plain "lockstitch". In the 301 stitch formation, needle thread which is supplied from a cone of thread is passed through the material and carried around a bobbin which has been wound with thread. The needle thread it than pulled up into the middle of the material carrying the bobbin thread with it. The ratio of needle thread to bobbin thread consumed in the 301 stitch should be 1 to 1 in a well balanced stitch formation. The type 301 stitch is the most popular stitch, reasons for its widespread use include: the stitch is reversible and looks the same on both sides; it is the tightest stitch formation which minimizes seam grinning; stitches are secure, higher strength and extensibility (30%); more secured than the chain stitch; it consumes the least amount of thread in its formation; it has better "hand", or feels smoother to the touch; lockstitch machines are very versatile and can be used on a variety of operations. The U.S. Military set up the standard specification system for seam construction and stitch types that is still widely used today in the garment and sewn products industries. Federal Specifications: DDD-S-751 - Stitches; Seams; and Stitching - Stitch Type 301. The latest version of this specification is 751A - Stitch Type 301. The specification has also been adopted by the International Standards Organization ~ ISO 4915 ~ standard for stitch and seam specifications - ISO#301 (lockstitch) Sewing Machine is in Good Vintage ~ Pre-Owned Condition Please view photos for a good description of this sewing machine Thank you!