The first image is a British 'County'-class heavy cruiser in the original configuration. One obvious tell for these ships are the funnels - the ships had three funnels, with the middle funnel being broader than the other two. They were armed with eight 8in guns in four twin turrets, and were built in the 1920s. The second is a Queen Elizabeth class battleship, either Barham or Malaya. Again, the main clue here is the funnel, which is two funnels trunked into one larger funnel - unlike the Revenge-class battleships, which had a single funnel from the start. The other ships of the class were rebuilt with more modern superstructures, which the model does not have. The ships were built before WWII, and rebuilt in the 1920s and 1930s. They were armed with eight 15in guns in four twin turrets. The last is a Leander-class cruiser. The single large funnel, and the superstructure, are good indicators for this class. They were built in the early 1930s, and were armed with four twin 6in turrets. And yes, these are recognition models used for training. What other ones do you have?