Fifty-one were built, of which the Germans seized twenty-four when they occupied Bohemia-Moravia in March 1939 and the Slovaks captured eighteen when they declared independence from Czechoslovakia at the same time.

The driver sat on the right side using an observation port protected by an armored shutter with a vision slit.

The armor ranged between 3 and 6 mm (0.12 and 0.24 in) thick; this was deemed enough to deflect ordinary bullets fired from over 100 metres (110 yd) distance.

30 is difficult to chart, but the Czech Army had been evaluating various Tatra truck chassis for use as armored cars since 1926 with a number of prototypes built over the years with both wooden and metal bodies to test vehicle layouts.

Tatra was late and only delivered the first six on 29 January 1934 followed by sixteen more in February and the rest in July because their garages in Milovice were not yet complete.

The engines were weak and did not allow the vehicle to fully exploit the abilities of the chassis, not even being able to cross the ditches at the sides of roads.

[5] Ten armored cars, no longer needed once that the border areas had been annexed by Germany and Hungary, were sold to the Gendarmerie in February-March 1939.

[6] Two companies defended Carpatho-Ukraine in March 1939 from a Hungarian attack, but were forced to seek refuge in Slovakia and Romania.

[9] Ten armored cars were seized by the Slovaks when they declared independence in March 1939, and eight additional OA vz.

30s fell into their hands from Czech troops who sought refuge in Slovakia after fighting the Hungarians in Carpatho-Ukraine.

30s was part of Mobile Group Kalinčiak that was formed on 5 September to work with the 2nd Infantry Division, but saw no combat before being withdrawn back to Slovakia on the 21st.

The only serious combat encountered by the Slovak armor was at Lipovec in late July where they failed to dislodge the Soviet 44th Mountain Rifle Division from its positions.

Once the Panzerkampfwagen IIs that the Ministry of Defense had ordered to replace them arrived in January 1944 they were put into storage although they were still carried on the books.