If you look back at Ulrich's posting of Bismarck, the colours are not the same as on the T model of Bismarck that I bought new. Navis Neptun T models in the early days had camouflage patterns spray painted through stencils or masks. Later, some were hand painted by Johann Ottman (of Spidernavy) and as more research came to light, he revised the colours he used. I have never seen yellow rafts on an original Littorio bought new from Navis Neptun, nor has one passed through my hands for authentication or valuation. I would guess that yours would be an early all grey model modified by or for a collector.