A gold acorn sword knot is a decorative tassel or cord attached to the hilt or handle of a sword. It's often used for ceremonial or ornamental purposes and serves both a practical and aesthetic function. The "acorn" part of the term refers to the design of the knot, which typically resembles an acorn, with a larger bulbous shape at the top and a narrow tassel below.

These sword knots are usually made from high-quality materials like gold-threaded cord, which adds to their visual appeal. They are often used in military and ceremonial settings, such as during parades, formal events, or other special occasions.

The use of a gold acorn sword knot can be seen as a symbol of prestige, rank, or honor, depending on the context in which it's employed. It's a small but significant detail that contributes to the overall regal appearance of a sword and its accompanying uniform or scabbard.

Keep in mind that the popularity and style of sword knots may vary by region, time period, and military tradition, so there may be variations in design and materials used. If you have a specific context or historical period in mind, I could provide more detailed information.