Usually a collector avoids double or triple items. But sometimes they lead to discoveries. Did you know for example that in the 19th-century print shop it was common practice to apply what we could call lithoshopping on the limestone plate? Look for yourself.
![Pas-de-Quatre-small](http://blog.imagesmusicales.be/wp-content/uploads/2014/10/Pas-de-Quatre-small.jpg)
![](http://blog.imagesmusicales.be/wp-content/uploads/2014/10/Pas-de-Quatre-compare.jpg)
In fact, some publishers shamelessly recreated on the stone almost identical copies of the covers originally published in another country.
![](http://blog.imagesmusicales.be/wp-content/uploads/2014/10/Pas-de-Quatre-mirrored1.jpg)
And then again, one Pas de Quatre is not the other Pas de Quatre, or is it?
Wonderful ! I ‘m looking in my collection for another example !