--- A 10:1 model from the Mainz museum of ancient seafare
The original ship was found at Oberstimm (near Ingolstadt) (link) ---
 
--> click to enlarge --> click to enlarge --> click to enlarge --> click to enlarge

 
--- Three blueprints of this model ---
 
--> click to enlarge --> click to enlarge --> click to enlarge

 
--- The first three pictures are again showing a model from the museum in Mainz
It is representing a much bigger type than the one from Oberstimm
The last image shows wooden models from an Dutch artist (link) ---
 
--> click to enlarge --> click to enlarge --> click to enlarge --> click to enlarge