The sole Š.331 and 22 out of 24 produced Š.231s were sold to representatives of the Spanish Republican government.
Sergey Letov | Yegor Letov | Letov Š-4 | Letov Š-1 | Letov L-101 |
The first indigenous aircraft, the Letov Š-1, was designed and built in 1920, and some 50 aircraft types were built by 1939.
The Letov Š-1 was a Czechoslovak single-engined, two-seat biplane surveillance aircraft, it was first military aircraft built in Czechoslovakia.
Although Czechoslovakia was a land locked nation, a floatplane variant was necessary for a Czechoslovak anti-aircraft artillery training depot in the Bay of Kotor (now in Montenegro) and four were built as the Š-328v.
It took part in the International Meeting at Zurich in 1922 with modest success but the Military Aircraft Works decided to concentrate its efforts on the biplane Letov Š-4 and the development of the Š-3 ended.
On 26 June 1934, one of these (registered OK-ADB) crashed during final approach to Karlovy Vary, killing all three on board, most notably the famous Austrian actor Max Pallenberg.