To be honest, my interest lies very firmly with the Anglean Republic, which really doesn't have it's own ship. It may be the Junker, but I just don't see it fitting the faction's need for old tech. Like, I don't know, when I think of their ships, I see flying industrial vehicles, or maybe pieced together tank bits. Very slow, very armored, and very immovable. Using other faction's ships, their's would probably look overweighted and tankish. Most likely coated in a thick layer of ice and possibly held together with whatever they could find. Like the Galleon would be a favorite, but most of the wood would be scraped for thick metal. Hell, they may even get rid of the four guns and put one giant one on that bottom that needs to have the ship facing the target.
