The vehicle was based on the chassis of the Ursus A 2-ton truck (Italian S.P.A. 25C modified by Ursus Mechanical Works in Warsaw), the armored body was built by CWS, Warsaw.

The initial armament consisted of the French 37 mm low-velocity gun in the turret front, 7.92 mm machine guns in the turret left-rear and right-rear at 120 degrees to the gun (all operated by the commander), and another 7.92 mm MG in the hull rear (operated by the rear gunner).

Although this arrangement helped to achieve good balance of the turret, it was awkward to use.

The vehicle was sufficiently armed and armored for the late 1920s, but was underpowered, lacked all-wheel drive (which led to poor off-road mobility) and had high silhouette.

8 vehicles were assigned to the 11th armoured battalion of the Mazowiecka Cavalry Brigade, Army Modlin, as a reconnaissance unit.