Rare Large Paper Nautilus Shell

Lare rare hard to find such a large Paper Nautilus Shell in fantastic condition. A spectacular piece of Nature.  The spirals in the creation of this shell actually has a Mathematical formula that Scientists can use to draw the spiral curve.  Other than extremely tiny loss, (say less than1/4 of a millimetre), on a few of the brown “spikes” are slightly “rubbed”; No other damage, no chips, no cracks, just near total perfection