18ct Gold & White Enamel 1910 pendant by Cartier

A rare 18ct gold and white enamel pendant by Cartier. It was made in Paris and I think it commemorates the Great Flood of Paris in January 1910.
In the winter of 1909–1910, Paris and the surrounding area experienced higher than normal rainfall which saturated the ground and filled rivers to overflowing. In January 1910, the Parisians were slow to notice warning signs within the city as the Seine’s water level rose eight meters higher than normal. By late January, the River Seine flooded Paris. The waters flooded Paris through tunnels, sewers, and drains. This was seen as a sort of spectacle where people were actually standing in the streets watching the water rise in the Seine. Over the course of the following week, thousands of Parisians evacuated their homes as water infiltrated buildings and streets throughout the city, shutting down much basic infrastructure. Police, firefighters, and soldiers moved through waterlogged streets in boats to rescue stranded residents from second-story windows and to distribute aid. Although the water threatened to overflow the tops of the quay walls lining the river, workmen were able to keep the Seine back with hastily built levees.
On 28 January the water reached its maximum height at 8.62 metres (28.28 feet) above its normal level. In March, the Seine finally returned to normal levels.
This pendant is marked Cartier Paris and numbered.