These are various ship designs from WW1 or shortly thereafter, modeled in 1/6000 scale. Many had little or no chance of being built.
La Motte-Picquet class French cruiser.
1917 Russian design for a Black Sea Battleship. The link has several 16-inch gun designs. Version 2 of the four variations by V.P. Kostenko (at the bottom of the page) was modeled since it was among the later designs (1917) and matches the drawings provided.
German Post-Jutland Battleship Design Studies. Battleship study L20eɑ was modeled since it was selected on 11 September 1918 as the basis for the next German battleship (Dodson, “The Kaiser’s Battlefleet” page 126). Battlecruiser study GK4541 was modeled since it was among the last designs considered (Dodson, “The Kaiser’s Battlefleet” page 127) and since it was included in the Avalanche Press game “Jutland 1919“.
Tillman Battleships. Design IV-2 was modeled since it was the one presented to Congress early in 1917.