List of Naval Guns, listed below by country of origin in decreasing caliber size:
Argentina
12"/50 caliber gun
7.5"/52 caliber gun
EOC 10 inch 40 caliber
EOC 15 inch 55 caliber
Austria-Hungary
Škoda 35 cm K14
Škoda 30.5 cm /45 K10
Škoda 24 cm L/40 K97
Škoda 19 cm vz. 1904
Škoda 15 cm K10
Škoda 10 cm K10
Škoda 7 cm K10
Škoda 7 cm guns
Brazil
EOC 12 inch/45 naval gun
China
Type 79 100 mm naval gun
H/PJ-38 130mm naval gun
France
380 mm Model 1935 naval gun
340 mm Model 1912 naval gun
340 mm Model 1881 naval gun
330 mm Model 1931 naval gun
305 mm Model 1910 naval gun
305 mm Model 1906 naval gun
305 mm Model 1893 naval gun
305 mm Model 1887 naval gun
274 mm modèle 1887/1893 naval gun
274 mm modèle 1893/1896 naval gun
240 mm Model 1902 naval gun
203 mm Model 1931 naval gun
203 mm Model 1924 naval gun
194 mm Model 1902 naval gun
194 mm Model 1893 naval gun
194 mm Model 1887 naval gun
164 mm Model 1884 naval gun
164 mm Model 1893 naval gun
155 mm Model 1920 naval gun
152 mm Model 1930 naval gun
138 mm Model 1888 naval gun
138 mm Model 1893 naval gun
138 mm Model 1910 naval gun
138 mm Model 1923 naval gun
138 mm Model 1927 naval gun
138 mm Model 1929 naval gun
138 mm Model 1934 naval gun
130 mm Model 1932 and 1935 naval gun
130 mm Model 1930 naval gun
130 mm Model 1924 naval gun
130 mm Model 1919 naval gun
100 mm Model 1891 naval gun
French 100 mm naval gun
90 mm Model 1926 naval gun
75 mm Model 1924 naval gun
Canon de 65 mm Modèle 1891
Canon Hotchkiss à tir rapide de 47 mm
Paixhans guns
Germany
40.6 cm SK C/34 Naval gun - also known as the Adolf gun, Intended for the H-class battleships which were never completed. Used as coastal artillery. 38 cm SK C/34 naval gun - World War II 38 cm SK L/45 naval gun - World War I 30.5 cm SK L/50 gun - World War I 28 cm SK C/34 naval gun - World War II 28 cm SK C/28 naval gun - World War II 28 cm SK L/50 gun - World War I 28 cm SK L/45 gun - World War I 28 cm SK L/40 gun - World War I 28 cm MRK L/40 - World War I 28 cm MRK L/35 - World War I 24 cm SK L/40 gun - World War I 24 cm K L/35 gun - World War I 21 cm SK L/45 gun - World War I 21 cm SK L/40 gun - World War I 21 cm L/35 gun - World War I 20.3 cm SK C/34 naval gun - World War II 17 cm SK L/40 gun - World War I MONARC - modern 155 mm artillery system 15 cm SK C/36 naval gun - World War II 15 cm TbtsK C/36 naval gun - World War II 15 cm SK C/28 - World War II 15 cm SK C/25 - World War II 15 cm UToF L/45 - World War I 15 cm SK L/45 naval gun - World War I 15 cm SK L/40 naval gun - World War I 15 cm SK L/35 naval gun - World War I 12.7 cm SK C/34 naval gun - World War II 10.5 cm SK C/33 - World War II 10.5 cm SK C/32 naval gun - World War II 10.5 cm SK L/45, SK C/06, Flak L/45, Tbts L/45, Ubts L/45 - World War I and II 10.5 cm SK L/40 naval gun - World War I 10.5 cm SK L/35 - World War I 8.8 cm SK L/45, Flak L/45, Tbts KL/45 - World War I 8.8 cm SK L/35 - World War I 8.8 cm SK L/30 - World War I 8.8 cm SK C/30 naval gun - World War II 8.8 cm SK C/31 naval gun - World War II 8.8 cm SK C/32 naval gun - World War II 8.8 cm SK C/35 naval gun - World War II 5.2 cm SK L/55 gun - World War I 5 cm SK L/40 gun - World War I 3.7 cm SK C/30 - World War II 2 cm FlaK 30/38/Flakvierling - World War II