The EDU61004 is a Leonardo da Vinci Printing Press Model Kit.

Leonardo da Vinci studied the Guttenberg printing press and finelytuned
it for greater efficiency. In his design da Vinci used a handpress
with an automatic system that moved the typesaddle forward and back
along a tilted surface. His press used a double thread which would
increase the travel of the press for each turn made of the lever.

The scientific genius of Leonardo da Vinci is brought to life through
this articulated model. The invention that inspired this snaptogether
replica is taken from the pages of Da Vincis priceless and
aweinspiring notebooks. All models are made of plastic and require no
special tools. Manuals are very educational and teach how these
inventions have evolved into what they are today.