50 were built, the last of which was delivered during 1936, of which the Germans captured 22 - including the prototype, when they occupied Bohemia-Moravia in March 1939, but they promptly scrapped them.

34 was assembled from a framework of steel "angle iron" beams, to which armor plates were riveted.

The radio operator sat on the left and had his own 120 by 50 millimetres (4.7 in × 2.0 in) vision port with 50 mm of bulletproof glass and an armored shutter.

The hull machine gun was between the driver and radio operator in a ball mount with 30° of traverse.

The commander had four episcopes in his cupola and a monocular mirror, 1.3 × 35° periscope which he could extend once he removed its armored cover in his hatch for vision while "buttoned-up".

This was deemed enough to deflect armor-piercing 7.92 mm bullets fired from distances greater than 75 metres (82 yd).

34 (A3) gun with a pepperpot muzzle brake and a prominent armored recoil cylinder above the barrel.

Production was delayed by quality problems with the initial batch of armor plates from Poldi and delivery of the pre-production series did not occur until 23 April 1934.

A bigger problem was that the Army had rejected ČKD's proposed armament of a 4.7-centimetre (1.9 in) Vickers 44/60 gun and two ZB vz.

The last tanks were delivered on 14 January 1936, but the six pre-production models had to be returned to the factory to be upgraded with the proper armament and otherwise modified up to the latest standards.

34 tanks was too thin and a program to replace it was quickly mounted which resulted in the LT vz.

In the meantime they offered the Army an opportunity to train with more modern tanks than its few surviving World War I-era Renault FTs.

In November 1938 it decided to concentrate all of them in the Third Armored Regiment in Slovakia, but only eighteen had been transferred before the German occupation of Czechoslovakia and the Slovak declaration of independence in March 1939.

They were shipped to Škoda Works for repairs, but the local military representative ordered them scrapped because of their poor condition and obsolescence.

The Waffen-SS tried to overturn this order as it planned to transfer them to Nazi puppet state of Croatia.

Two were saved from the scrapyard, but by March 1945 the others had their turrets salvaged to be rearmed with two machine guns and mounted in fixed fortifications.

34 light tanks which the Czechs had evacuated from Carpatho-Ukraine to Humenné and Prešov) formed one company in the Armored Battalion "Martin" formed by the Slovak Army in mid-1939, which was later expanded into the Armored Regiment, but they were relegated to training duties once the Slovaks began to receive more modern tanks from Germany in 1941.

[8] Ten were abandoned by the insurgents when the Slovak National Uprising began in September 1944 and were quickly captured by the Germans.