A simple lucite (acrylic/perspex) clear faceted table lighter...
The lucite looks like solid clear crystal and is a cube shape with faceted upper and lower corners and flat polished faces. The lighter has a chrome and steel mechanism, made in Japan, which removes easily if needed. No other maker's marks. Circa late 1960s or 1970s space age era.
The lucite block is a 7 x 7 x 7cm cube. Very good condition with no chips, minimal surface marks. There are little clear tabletop protector pads to the base. Sold as a prop or desk accessory and as unworking and untested... I don't know much about lighters, sorry.
Fabulous 1970s retro style and great for minimalist or space age home decor. 
Free P&P to the UK.