The BBC fim about Heracleion the other day had a nice find. There was a lead model of an elephant complete with tower. They described it as a votive but I reckon it might have worked in 28mm :)
It is about 13 minutes in http://www.bbc.co.uk/iplayer/episode/b04lss20/swallowed-by-the-sea-ancient-egypts-greatest-lost-city