Here is a very interesting mule (I didn't find any images found on the web), so I made up according to the information in the SCWC (and its reproduction in numista).
The 5 centavos (km398) coin used the reverse of the coin and either the obverse (four times) or the reverse (once) of the km410, 1 peso gold coin!
This is my documentation of the km398 mules, what do you think, have I got it right?
Comments are as usual welcome.