This is one of the four models that form "25 or 6 to 4" series. It is based on a Hyperbolic Tessellations fractal variation with two levels of fractal depth. The design is doublesided. Its construction allows threading a chain/string through it, which explains the lack of a hanger. Though it looks similar to [Twenty](https://skfb.ly/69OK6) they also differ considerably from one another
As to "25 or 6 to 4" - a great song by a great band in a great time.
Application: wall art decoration or jewelry pendant/broach.