It's a model, and basically the significance is that it's one of my favourite machines from the show. XD The model is technically the Tallgeese III, but it comes with all the parts to make it the original, as well! :D I think that's kinda neat.

(It also comes with the pilot, Milliardo Peacecraft/Zechs Merquise/"Wind", but I need to paint him; right now his clothes are all flesh tone.)