The Skoda Model 1928 Gun was a Czechoslovak long-range, dual-purpose cannon designed for the attack of static fortifications and coastal defence duties. About 20 were bought by Yugoslavia and possibly more by Romania, although this latter has not been confirmed from Romanian sources. Guns captured by Nazi Germany after the Invasion of Yugoslavia were used by the Heer as the 15 cm Kanone 403(j). It was tested by the Czechs as the 15 cm kanon NOa, but was not purchased.
The gun was mounted on a metal firing platform to give it 360° traverse. It was transported in three loads.
Chamberlain, Peter & Gander, Terry. Heavy Artillery. New York: Arco, 1975 ISBN 0-668-03898-5
Gander, Terry and Chamberlain, Peter. Weapons of the Third Reich: An Encyclopedic Survey of All Small Arms, Artillery and Special Weapons of the German Land Forces 1939-1945. New York: Doubleday, 1979 ISBN 0-385-15090-3