Geoffroy,
Position of safety-it is in the lower metal and a rocker style on an 1894 patent gun, in the breechblock, and a rotating lever on a 1909 patent gun.

I can't tell from the above pictures, exactly what type of gun he has. I also can't tell if it would be a two piece stock, or a one piece stock. Most 1894 patent guns use a one piece stock.
Best,
Ted