this is a guess, but if it is painted black or green try looking on google or wikipedia for 38 class locomotive New South Wales government railways in Australia
these may be of interest
http://stores.ebay.co.uk/PLANS-N-THINGS_battleship-plans_W0QQcolZ2QQdirZ1QQfsubZ2QQftidZ2QQtZkm
another with free plans is; but these are mainly WWI although the Prinz Eugen is there as well as a couple of other KM small ships and also submarines...