Estimated army name : 15 mm machine gun vz. 38
Factory designation : ZB-60, or ZB 15 mm
Yugoslavian title : Mitraljez 15 mm M 38
British title : Machine gun BESA 15 mm Mk. I
German name : MG M38(t), 15 mm FlaMG 39, or 15 mm FlaMG 490(j)

Caliber : 15mm
Stack : 40 rounds of ammunition in a metal charge of the belt
Length : 2050 mm
The length of the barrel : 1400 mm
Weight : 55 kg
The weight of the carriage : 203 kg (gun třínohou lafetu with wheels for transport)
Muzzle velocity : 860 - 970 m/s
Rate of fire : 420 healing/min
Manufacturer : Československá Zbrojovka Brno (later Waffenfabrik Brünn)
American velkorážný machine gun set up in Yugoslavia, the weapon has been taken Wehrmachtem (including kořistních of yugoslavia) and for WH i produced as 15 mm FlaMG 38t. WH machine gun used primarily as an anti-aircraft weapon. The license was sold to Great Britain where the weapon was also produced and used as BESA MkII , therefore, similar as the 7,92 mm machine gun of the same origin derived from the ZB37. The british guns were used in the tanks Vickers Mk.IV ..

15 mm machine guns and export them
Československá zbrojovka (during the protectorate, was part of the Herman Gering Werke and later the Waffen Union) produced in the years 1938 to 1943 to export the below mentioned numbers of 15 mm machine guns:

70 pieces delivered to Iran between the years 1938-1939
477 pieces delivered to the Jihoslávie between the years 1938-1940
140 pieces delivered to the Uk in the range of the months of January to April 1939, plus the manufacturing licence
200 pieces for the Germany - order Kriegsmarine between the years 1940-1941, the information is necessary to verify also in the Bundesarchivu
250 pieces delivered to Spain in the range of November 1942 - July 1943, the information is necessary to verify also in the Archivo General Militar

Springs
The moravian land archive in Brno, fund PA ZB, quarterly executive reports
The moravian land archive in Brno, fund PA ZB, the minutes of the meeting of the works committee, 09.12.1942
The moravian land archive in Brno, fund PA ZB, circular no. 6, 26.01.1944
The moravian land archive in Brno, fund PA ZB, subtotals contracts, 10.06.1944

Links
Catalog gun factory in Brno, published directorate, Prague 1942
Statistical rapporteur, roč. IX., Prague 1946
Václav King: Issues of economic and social development in the Czech lands in the years 1938-1945, parts 1 to 3, the czechoslovak academy of SCIENCES, Prague 1957-1959, ISBN does not
Otakar Franěk: Weapons for the whole world, 2. part of the history of the group brno gun factory, japan. Block, Brno 1970, ISBN does not
Miroslav Šáda: the Czechoslovak small arms and machine guns, NV, Prague 1971/1, ISBN does not
Otakar Franěk: Group brno ammunition company in the years 1939/1945, 3. part of the history of the group brno gun factory, japan. Block, Brno 1973, ISBN does not
Lubomír Popelínský: the Czechoslovak automatic weapons and their makers, Our troops, Prague 1999, ISBN 80-206-0567-3
Lubomír Popelínský: the Saga of the genus guns, Deus, Prague 2002, ISBN 80-86215-33-4

Note
The elaboration of a literature search made the the person from within the University of defence in Brno (ex VA) and the Military historical institute in Prague. These persons do not wish to be named..

I will add photos of the weapons from the museum in Lešany, the weapon is described as a 15 mm ZB-60. in the text he writes :" In 1938, was preparing his introduction to the equipment of the czechoslovak army." Furthermore, it is mentioned and exports to Yugoslavia and Iran, according to the labels is a weapon on the protiletadlovém pedestal..

This photo I took in Lešany 2005..

I don't know if start a thread for BESA separately, so far I'll put a photo here, the museum Koblenz, my archive.

Lešany 2009,
own photo.

.