Update of my Vitry Frères case :
http://i39.servimg.com/u/f39/13/33/95/13/captur10.jpg
http://i39.servimg.com/u/f39/13/33/95/13/captur11.jpg
Changed the all-metal razor (that was previously in) for a Thinet, the enterprise that bought Vitry Frères in the late 1800.