From 1935 VIS was the prescribed gun for the officers and NCOs of the Polish Army. This pistol was also a part of the Poland's police equipment. They were issued in the set with leather holsters fitted with two pockets for spare magazines.
The VIS gun was used in all the pre-war military formations. With the development of production they were successively assigned to the units. In June 1938 they were already in Polish armored units, cavalry and in aviation. Next, the pistols were received by the infantry, communication units and artillery. They were used in the Polish Navy (black holster was used together with the garrison and field outfit, in the guard of honor the holster was white). These guns also appeared in the Border Protection Corps.
And here yet another article with pictures:
Interesting fact - There have also been attempts on the use the gun as a machine gun, adapted to the serial fire (equipped with a high capacity magazine and included wooden flask, which simultaneously supposed to fulfill the function of carrying case). Unfortunately, the war interrupted the work started.
VIS with flask