20.3 cm SK C/34 gun
20.3 cm SK C/34 gun is a rifled breech loader or naval artillery.
Overview
German naval artillery.
In detail
It is associated with Germany.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“20.3 cm SK C/34 naval gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1602887: 20.3 cm SK C/34 gun
Consult the source