Hario coffee roaster

http://www.coffeecircle.com/blog/kaffee-selber-roesten-zuhause/

https://www.berliner-kaffeeroesterei.de/shop/Hario-Kaffee-Roester-Retro,pd,products_id=11507.html

https://www.youtube.com/watch?v=zL0f_-Rav9o