Tomoo Hosono Teleidoscope "TK" #552

Teleidoscope is a kaleidoscope without object cell.  Instead it has a crystal ball in front of the mirror system.  You will see what you are pointing as kaleidoscopic patterns. With your move the images change dramatically and unlimitedly.
What is unique with Hosono's teleidoscope  is mirror system.  This one has 45-45-90 mirror system and it shows repeated 4 point patterns.
There are other types as well, so please compare the differences.  
Diameter: 17mm    Length: 110mm