13121.47 is the serial number of a Teko laser engraving machine that is designed to make 2D and 3D engravings and markings on a variety of materials. It can engrave materials, such as wood, plastics, metals and glass, with a high degree of accuracy and detail. The Teko laser engraving machine features a large build surface, an LCD display, a high-precision laser head, an advanced control system and a range of engraving tools and accessories. It also offers a wide array of engraving options, such as surface etching, photo-etching, ceramic etching and more.